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AR-15

AR-15 Modern Sporting Rifle
AR-15 Trigger Shims, Hammer Shims and Pivot Pin / Take-Down Pin Shims
Compensator Shims / Muzzle Brake Shims / Flash Suppressor Shims
AR-10 Pivot Pin / Take-Down Shims

AR-15 Parts and Accessories by Wolff and Leapers UTG PRO

What AR-15 Custom Trigger Job would be complete without our Custom Made 300 Series Stainless Shims?
We Manufacture Shims to fit Mil Spec Small Pin (.154") and Colt Large Pin (.170") AR-15 Trigger Pins and Hammer Pins.
Reduces Side Play, Reduces Drag and Rubbing of Trigger Group Parts.
More Consistent Trigger Pull in your AR-15 Trigger Job.
Our Pivot Pin Shims take the Play out of your Upper to Lower Receiver.
Our Compensator Shim Kit will make Timing Your Muzzle Device Easy and Effortless.

*Click on any Picture to Enlarge in a New Window*

Our Shims are Available in .002" through .009" 
Order Any Kit on This Page and Request Custom Sizes via Email.
 

Need a New Free-Float Quad Rail and Gas Block for your M4 AR-15?
Look at our UTG Pro USA Made Quad Rail Below
Also our UTG Pro USA Made Quad Rail Gas Block Too!

Leapers AR-15 Clamp-on Sights are imported, but very well made and an exceptional value!
UTG Compact Rear Detachable Sight
UTG Folding Front Sight
UTG Low Profile Front Sight

USPS Priority Shipping
Most all our items include Free Shipping First Class USPS
You can Upgrade to Priority Mail for $5.80 with any order
 Click the "ADD TO CART" button below to Add Priority Shipping to your order

Your Payment is Secure with our PayPal Checkout.

Large Pin or Small Pin?
"Large Pin Colt"
"Mil-Spec Colt"
"Small Pin Colt"
"Mil-Spec AR-15"
Colt AR-15 Hammer and Trigger Large and Small Pins

Some civilian Colt AR type rifles were manufactured with hammer and trigger pins and holes which are .170 inches in diameter. These are referred to as large pin Colt receivers. This was not in all Colt models, just some.
All other AR type rifle manufacturers have used the military specification .154" diameter hammer and trigger pins and holes, or small pin.
The only way to know for sure is to measure your pins or the holes in your lower receiver to determine if you have a small pin or large pin Colt receiver.

Ar_15/ar15_trigger_pins.jpg
If you are building a Kit Rifle with a Stripped Lower Receiver and a Parts Kit, or own a Factory Built Rifle, Our AR-15 Shims are Easy for Novice or Expert alike to Install.
If you are doing a AR-15 Trigger Job, or installing a Trigger Kit, add our shims to take out the slop and stop parts from rubbing.



Ar_15/ar15_trigger_shim.jpg
This is the AR-15 Trigger and Disconnector Assembly
with an AR-15 Trigger Shim Installed to show size.
Our Trigger Shims will fit the Trigger, Hammer and Disconnector of most
Small Pin AR-15 Style Rifles.
Care must be used when installing to insure no binding is present.

Ar_15/ar15_hammer_shim.jpg
AR-15 Trigger Shim Installation Instructions

Remove Magazine and Open Chamber, Make Certain Gun is Unloaded!
Remove Take Down Pins and Separate Upper from Lower Receiver,
Set Upper Aside.
Remove Hammer Pin and Remove Hammer.
Remove Trigger Pin and Remove Trigger.

Now Remove the Springs from the Hammer and Trigger, including the Disconnector Spring and set aside.
Set the Disconnector aside.
Now you can Re-Install Your Hammer and Trigger Without the Springs and Install Shims to Check for Clearance.
This is necessary to Make Certain there is No Binding or Sticking of the Trigger and Hammer.
Remove Pins and Hammer and Trigger, Install Disconnector without Spring into Trigger, add Shims, install Trigger Pin and check for proper clearence and free movement of the Disconnector with shims installed.
Again, you must be absolutlely certain there is no binding and the Disconnector Moves Freely.
There is Normally Very Little Clearance between the Disconnector and Trigger, and may not need to be shimmed, or you may just want to skip putting shims in there all together.
In Order to Shim the Disconnector you will need to use a Cheater Pin, Reassemble the Disconnector and Shims and Spring into the Trigger as a Sub-Assembly.
ReInstall the Trigger into the Lower Assembly now that you are Assured the is No Binding Caused by Adding Shims, Once the Trigger Assembly are Installed, it is a Simple Matter to Install the Shims.
Simply Push the Trigger Pin out just enough to slide a shim Between the Housing and the Trigger.
A Little Gun Oil on the inside of the Lower Housing will Allow the Shim to Stick and Slide Easily with a Tooth Pick into Place, working the Trigger Assembly to Align Shim, slide the Trigger Pin Back into Place.
The Hammer and Shims can now be Installed in the Same Manner.
Be Sure Again to Check Your Work for Free Movement and No Binding on Trigger/Hammer Parts.
Safe Operation is your Sole Responsiblilty, if you have any question, have it checked by a Competent Gunsmith.

Complete AR-15 Lower Receiver Parts Kit Assembly Instructions are available at:  
AR15.COM

Ar_15/ar15_six_pak.jpgAR-15 Trigger Shims
Our AR-15 Shims are made by us here in the USA out of American Made Materials.
Available in 300 Series Stainless Steel, in Standard Mil Spec .154" and Large Pin Colt .170"

Six Pak kits come Standard in .005" SS
12 Pak Assortment has 4 X .002", 4 X .003" and 4 X .005"
24 Pak kits come Standard in .005" SS
and in a 24 Assortment Pak which has
8 X .005", 8 X .003", 8 X .002" Shims

  Item # AR15-TSP6   Trigger Shim 6 Pak $10.00 Free Shipping           
  Item # AR15-TSP12A Assortment Shim 12 Pak $17.00 Free Shipping
  Item # AR15-TSP24 Trigger Shim 24 Pak $22.00 Free Shipping         
  Item # AR15-TSP24A Assortment Shim 24 Pak $22.00 Free Shipping

AR15 Trigger Shim Pak (Mil Spec)

AR15 Trigger Shim Pak (Large Pin Colt)

Lance, Your product (Pivot Pin Shim) is fabulous!
My AR is nice and snug now without the use of the polymer wedge inside.
I’m absolutely thrilled and have already ordered more of your shims.
Great work and I’ll sing your praises on the forums I frequent.
Thanks, Randy P.

AR-10 Pivot Pin / Take-Down Pin Shims
You can use these shims on your front Pivot Pin to take out the play between the Upper and Lower Receiver.
May be used singly or stacked.AR-10 Pivot Pin Shims
Our AR-10 Shims are made by us here in the USA out of American Made Materials.
Fits Standard .276" Pivot Pins / Take-Down Pins of Armalite and clones.
Available in 300 Series Stainless Steel, in 002" through 009" Thickness.

Two Pak kits come Standard in .005" SS
Six Pak kits come Standard in .005" SS
12 Pak Assortment has 4 X .002", 4 X .003" and 4 X .005" SS
24 Pak kits come Standard in .005" SS
and in a 24 Assortment Pak which has
8 X .005", 8 X .003", 8 X .002" Shims
-OR-  Specify sizes by email when ordering

 Item#  AR10-PSP2 Pivot Pin Shim 2 Pak $5.00 Free Shipping             
 Item# AR10-PSP6 Pivot Pin Shim 6 Pak $10.00 Free Shipping            
 Item # AR10-PSP12A Assortment  Shim 12 Pak $17.00 Free Shipping
 Item # AR10-PSP24 Pivot Pin Shim 24 Pak $22.00 Free Shipping       
 Item # AR10-PSP24A Assortment Shim 24 Pak $22.00 Free Shipping 

AR-10 Pivot Pin Shim Pak

***********************

AR-15 Pivot Pin / Take-Down Pin ShimsAR-15 Pivot Pin Shims
You can use these shims on your front Pivot Pin to take out the play between the Upper and Lower Receiver.
May be used in combination with an Accu-Wedge.

Our AR-15 Shims are made by us here in the USA out of American Made Materials.
Fits Standard 1/4" Pivot Pins / Take-Down Pins
Available in 300 Series Stainless Steel.
2 Pak Kits come Standard in 005" SS
Six Pak kits come Standard in .005" SS
12 Pak Assortment has 4 X .002", 4 X .003" and 4 X .005" SS
24 Pak kits come Standard in .005" SS
and in a 24 Assortment Pak which has
8 X .005", 8 X .003", 8 X .002" Shims

 Item # AR15-PSP2 Pivot Pin Shim 2 Pak $5.00 Free Shipping             
 Item # AR15-PSP6 Pivot Pin Shim 6 Pak $10.00 Free Shipping            
 Item # AR15-PSP12A Assortment  Shim 12 Pak $17.00 Free Shipping 
 Item # AR15-PSP24 Pivot Pin Shim 24 Pak $22.00 Free Shipping        
 Item # AR15-PSP24A Assortment Shim 24 Pak $22.00 Free Shipping 
 Gunsmith Special  30 Pcs .005" 10 Pcs .003" 10 Pcs .002"                   
 Item # AR15-PSP50GS  50 Piece Special........   35.00 Free Shipping    
 

AR-15 Pivot Pin Shim Pak

AR-15 Compensator / Muzzle Device Shims
Our Shims will fit Barrels with 1/2" Threads.AR-15 Compensator Shim
For Timing Compensators, Flash Hiders and Muzzle Brakes
By using Our TriggerShim Brand Muzzle Shims, you will be able to Achieve a Far Greater Degree of Precision than any Crush or Peel Washer.
Fast and Easy to Install, our Kit Includes .003" through .009" Shims.
Using a .009" Shim on a 1/2"-28 TPI Barrel Gives Approx. 1/4 Turn in Timing
This 7 piece kit is a total of .042" of  Shim Sock, Allowing for Full Adjustment.
Made from USA Full Temper 300 Series Stainless Steel
Nominal O.D. of .751" X I.D. of .511"
AR-15 Compensator Shims
 
7 Pak   Assortment comes with 1 each
.003"  .004" .005" .006" .007" .008" and  .009"
14 Pak Assortment comes with 2 each
.003"  .004" .005" .006" .007" .008" and  .009"
28 Pak Assortment comes with 4 each
.003" .004" .005" .006" .007" .008" and .009"

-OR-
Choose any Pak and Specify your sizes via e-mail
 
  Item # AR15-COMPSP7 Compensator Shim 7 Pak $14.00 Free Shipping           
 Item # AR15-COMPSP14 Compensator  Shim 14 Pak $24.00 Free Shipping       
 Item # AR15-COMPSP21 Compensator Shim 21 Pak $32.00 Free Shipping        
 Item # AR15-COMPSP28 Compensator Shim 28 Pak $38.00 Free Shipping
        

AR-15 Compensator Shims

Customer Testimonial on our AR-15 Pivot Pin Shims;
Hello Lance,
                I received  my package of shims this week, shipping was fast, packaging and parts are in pristine condition.
I couldn't be more satisfied to purchase this assortment of AR-15 pivot shims.  The option of three different sizes allows you to fit correctly.  As a bench rest shooter I am confident these shims will eliminate the variance in my upper receiver.  This is really a hard to find item and is a quality upgrade.  It was a pleasure to do business with TriggerShims.com        
Thanks....  Jim in Michigan

 Lance,
      Got your shims in today. I have a Palmetto State Carbine with a 12 inch free float hand guard. I'm attaching shots of the pivot pin up close with your shims installed. I had to use one .002" shim and one .003" shim to get it just right. It was not the easiest to install but the effort is well worth it. Now the upper to lower fit is rock solid with still smooth operation when opening the rifle. I will try my best to never remove the pivot pin to avoid having to re shim. Excellent product, super fast shipping, incredibly satisfied. Very precise product. Thanks!
Jimmy D.

Accu-Wedge for AR-15 / M16 - Made in the USAAccu-Wedge
Drop-In Accuracy Fix; Stops Unwanted Movement Between Receiver Halves
Can be used in combination with our Pivot-Pin Shims.

One of the fastest, easiest, cheapest accuracy-improvements you’ll ever find for your AR! Tough, high-density synthetic rubber wedge drops into the space behind the rear takedown pin in the lower receiver to provide tension between the receiver halves and prevent movement for improved accuracy. Takes the “loose gun” factor out of the equation, so you shoot tight, consistent groups. Can be trimmed to accommodate any variation in upper-to-lower receiver fit.
And Made in the USA!

 Stock # AR15-Wedge     $9.95  w/Free Shipping 

WOLFF CAR-15, M4 AR-15 Carbine
Rifle Service Pak - Standard
Replacement springs are for Colt AR-15, CAR-15, M-16 and M4 rifles.
AR-15 Carbine Rifles and Most Clones.
Rifle Service Paks - Springs to Return Rifle to Original Factory Condition. All springs are Factory Specification Strength.
Contains 1 each Standard Recoil Spring, Bolt Catch Spring, Buffer Retainer Spring, Disconnector Spring, Dust Cover Spring, Ejector Spring, Extractor Spring, Forward Assist Spring, Front Sight Retainer Spring, Hammer Spring, Magazine Catch Spring and Trigger Spring.
Note: Hammer Spring is for Semi-Auto Models Only

Stock No. 30454.....
$ 38.95

Wolff 30454 $38.95 Free Shipping


US Colt AR-15/M16, M4/CAR-15 Reduced Power Trigger Function Pak
#34910     $12.95
Wolff 34910
Wolff Trigger Function Pak also fits AR clones, contains 1 each Reduced Power Trigger Spring and Disconnector Spring.
Designed to Lighten and Improve Trigger Function.


 Wolff 34910   $12.95   Free Shipping

How to Install the Wolff 34910
Reduced Power Trigger Function Pak
Colt AR-15/M16, M4/CAR-15
and Clones.


JP Enterprises Reduced Power Trigger Spring Pak
Colt AR-15/M16, M4/CAR-15
and Clones.

The "Poor Man's" Trigger JobJP Ent AR-15 Springs

Spending $140 or more for trigger parts on every AR-15 rifle you may own may not be realistic. If you can't quite pop for a JP Enterprises complete trigger kit, or have too many rifles and can't justify expensive triggers in all of them, then this may be for you. You can achieve a significant improvement over stock parts by using a set of JP custom trigger/hammer springs. With proper sear and hammer notch preparation, a livable 4.5 to 5.0 smooth trigger in a rifle with standard trigger components is possible. It will not have the extremely short engagement/over travel feel like the JP trigger, but you will have a smooth "roll-off" feel that will give usable trigger control. The spring kit includes trigger, hammer and disconnector spring and complete instructions on how to prep your parts for best results.

Note: Use of this spring kit requires the use of US manufactured (domestic) ammunition or reloads with domestic (non-NATO spec) primers as ignition reliability will beJPS3.5 Tag reduced with hard low sensitivity primers as found in made foreign made ammunition's and NATO specification ammunition. Use these parts only in rifles for recreational or competition shooting. Do not use this spring kit for any defense or duty applications or any AR-10 type rifle.


 JP Enterprises JPS3.5 $20.95 Free Shipping  
   Add 2 Shims  x .005"  $24.95 Free Shipping  
   Add 6 Shims   x .005" $28.95 Free Shipping  
 


AR-15 Spring Kit JPS3.5

How to Install the the JP Enterprises
Reduced Power Trigger Hammer Disconnector Spring Pak in an AR-15


How To Install a UTG PRO 6-Position Mil-Spec Stock Assembly

RBU6BM
MADE IN THE USA
UTG PRO 6 POSTION MIL-SPEC M4/AR15 
COLLAPSIBLE STOCK ASSEMBLY
UTG PRO M4 STOCK RBU6BM
Polymer Stock Assembly
Mil-Spec Diameter Extension Tube from Aircraft Aluminum
 with Hard Anodizing
Comes Complete with:
Action Spring
Buffer Assembly
Tear Drop Ring
Locking Ring
A Very Nice Stock, I was Impressed when I Saw it,
Excellent Fit and Finish, I own one and I think you should too!

#WRBU6BM     $68.95   FREE Shipping 

TL-T6TD02
UTG MODEL M4/AR15 COLLAPSIBLE STOCK
RECEIVER PLATE
UTG M4 RECEIVER PLATE
Matte Black Finish Steel
Dual Shaped Sling Loops to Accomodate Ambidextrous Strap
and Metal Hook Sling Applications
Compatible with Most Sling Hooks

#WTL-T6TD02     $9.95     FREE Shipping

RB-M4BTP11B
UTG DELUXE MILATARY STYLE BUTT PAD-BLACK
UTG RB-M4BTP11B
Fits M4 and AR15 6 Position Retractable Stock
1" Extension
Made of Black Rubber
Non-Slip Surface
Slip On Sleeve Design with Lip for Perfect Fit

#WRB-M4BTP11B     $10.95   FREE Shipping 

MNT-RS08L
UTG 13 Slot Medium Profile Riser Mount
UTG_MNT_RS08L.gif
Length 5.7"
Width 1.75"
Height 1"

Medium Profile Mount for Rifles with Weaver/Picatinny Rail
Matte Black Aluminum
0.83" Saddle Height with See Thru Design
5.7" Long Picatinny Rail with 13 Slots

#WMNT-RS08L     $21.95    FREE Shipping!

MNT-BR101TR-A
M4 AR-15 Tri-Rail Barrel Mount
Fits Three Barrel Sizes
webassets/MNT_BR101TR_A_PRO_1.gif
Length: 2.6 Inch
Width: 2 Inch
Height: 2.2 Inch

Comes Complete with 2 Sets of Adaptors for Perfect Fit on:
       Standard Barrel
       Bull Barrel
       Light Weight Barrel
Attaches to AR-15 Barrel and Compatible with
A2 Front Sight and Bayonet Lug
Made from Aircraft Aluminum with Black Anodizing
Includes Left,  Right and Bottom Picatinny Rails, 6 Slots Each
 
 #WMNT-BR101TR-A $29.95 FREE Shipping! 

AR 15 Model 4/15 Carry Handle & Flat Top Dual Use Ring Mount
Nice Compact 1 Piece Ring Set, will fit Weaver/Picatinny Scope Rail or Carry Handle
webassets/MNT_168S_PRO_2_MCO-LOGO.jpg
Robust and Solid Carry Handle Mount Complete with 1" Integral Rings
Three Adjustable Mounting Positions to Tightly Secure the Carry Handle and Allow for Flexible Eye Relief Adjustment
Designed with Integral Ring Mount Support for Hard Tactical Use
Additional Flat Top Adapter with 2 Thumb Screws and Clamping Plate
Item # MNT-168S Imported


 #WMNT-168S $23.95 FREE Shipping! 
Temporarily OUT of Stock 
 
 

UTG PRO MTU012
MADE IN THE U.S.A
Model 4/AR15 LOW PROFILE QUAD-RAIL
GAS BLOCK
UTG_MTU012.gifThis is one nice Gas Block, and it should sell for twice this price.
I have one on my AR-15, I am very happy with it and I think you will be too!
Fits .75" Barrel
Replaces Front Sight
Provides 4 Picatinny Rails
Machined from Aircraft Aluminum
Black Matte Finish
Top Rail Lower than Flat Top by .28"
Includes Gas Tube Roll Pin and Locking Screws

#WMTU012     $39.95     Free Shipping

UTG PRO MTU012H4
MADE IN THE U.S.A
Model 4/AR15 HIGH PROFILE QUAD-RAIL
GAS BLOCK

Leapers MTU012H4 Made in USA High Profile Quad-rail Gas Block for AR15
 Replaces A2 Front Sight and Provides 4 Picatinny Rails
 Fits 0.75" Regular Barrel and Standard Gas Tube
 Extra Set Screw For Ultimate Security Enhancement
 Precision Machined from Aircraft Aluminum with Tight Tolerance Control
Hard Anodizing Black Matte Finish
Top Rail Matches Height of Flat-top Receiver for Accessory Installation
Includes Gas Tube Roll Pin and Locking Screws

#WMTU012H4     $44.95     Free Shipping 

Leapers UTG  MNT-950RS02-B Leapers UTG MNT-950RS02-B
Model 4/AR15 Detachable Compact Rear Sight

•Made from aircraft aluminum
•Integral Picatinny mounting deck to fit all flat tops
•Equipped with locking retention thumb nut
•Precision windage and elevation adjustments
•Dual aiming apertures for all shooting requirements
•Synchronize iron sight with tactical dot/reticle
•Dramatically improves sight pictures and enhances shooting accuracy
  -Nicely Built, you will not be disappointed
   
   
#WMNT-950RS02     $32.95     Free Shipping 

Leapers UTG  MNT-751Leapers UTG MNT-751
Model 4 AR-15 Flip-Up Front Sight
for Regular Height Gas Block
 


#WMNT-751     $24.95     Free Shipping

Leapers UTG  MNT-751L - Low ProfileLeapers MNT-751L
Model 4/AR15 Flip-Up Front Sight
for High Profile Gas Block -or-
Mount to Hard Guard Rail


#WMNT-751L     $24.95     Free Shipping 
 


UTG PRO MTU005
Model 4/15 Carbine 7" Free Float Quad Rail SystemMTU005 Free Float Quad Rail System

Made in USA right here in Michigan
Compatible with Both Gas Tube and Adams Piston System, it has a Slim Profile and Ultra Lightweight Design
Solid Aircraft Aluminum Construction with Hard Anodizing, Precision Machined and Torture Tested for Maximum Durability
Un-impeded Top Rail Platform Consistent with Flat Top Rails
Includes 12PCs Rail
Covers
MFR # MTU005

NOTE: Note: This model works with standard AR15 upper receiver. It may not be compatible with any re-designed, oversized upper receiver.

  #WMTU005    $97.95  FREE Shipping 
Temporarily OUT of Stock 
 
 
 
 

RB-HP12B-A
UTG Rubber Rail Guard 1 Dozen-BLACKRubber Rail Guard

Fits M4 and AR15 or Any Accessory Rail
on Rifles or Shotguns
For use with Picatinny or Weaver Rails
Flexible, Great Quality
Provides Protection of Rails and Handguards
I use them and like them, you will too.
Made of Black Rubber
Comes 12 to a Pack


#WRB-HP12B-A     $15.95   FREE Shipping 


AR-15 .22LR Conversion Kit*Link to CMMG .22 LR Conversion Kit
Dedicated Upper AR-15 .22 Build

Let me tell you about an AR-15 .22 LR Dedicated Upper I built with parts here at TriggerShims and from Brownell's through the links on this page.
The conversion kit was made by CMMG and is available in several different configurations.
I chose the CMMG Stainless Steel .22 LR Kit because the reviews I read said it didn't require any Break-in Time, and besides, I am a sucker for Stainless Steel.
The kit I have is the Bravo Model SS Conversion Kit with 25 Round Magazine,  there is an Alpha Model in Black Phosphate, and an Echo Model in SS with Forward Assist.
   I decided to build a complete Upper Assembly with a Dedicated Barrel, DPMS Flat Top Upper Receiver, Leapers Full Float Tactical Handguard,  Leapers Quad Rail Gas Block, (both available above on this page) and cap it off with a DPMS A1 Flash Hider. I like the A1 Flash Hider simply because it is simple, no timing/clock positions to worry about.
And cheap, you can pick one up for under $8 at Brownell's or at most any Gun Show.

Brownell's has a lot of AR-15 Upper Receivers to choose from, I went with a USA Made DPMS A3 and added a forward assist and Ejection Port Cover.Link To DPMS A3 Flat Top Upper Receiver
Precision machined from a premium-grade aluminum forging and hardcoat anodized for extra strength, with a tough, scratch-resistant Teflon coating, I know DPMS makes quality products, or I wouldn't recommend them.
Brownell's also carries USA Made Receivers  from Colt to Armalite to Wilson Combat and a new offering from Brownell's, the Laser Etched Flattop Upper available with many Laser Etched logo's including the sought after "Zombie Hunter"

I have to admit two things, first, shopping for the parts to assemble this gun was a lot of fun, and second, every time I shoot it I grin like a little kid!
There are a host of very nice AR-15 .22 clones on the market, from the Umarex Colt M4 OPS I saw at Cabela's for $499 on sale to the Mossberg Clone .22 Rifle at Walmart in the $225 range.
The reason I wanted to go with a Build was I could choose my own combination of parts, I enjoy the planning and shopping, and the sense of accomplishment in having it turn out as planned.CMMG .22 Dedicated Barrel Link to Brownells
I could have just added the CMMG .22 conversion to my .223 upper, but I wanted a dedicated .22 barrel and the M4 Contour CMMG AR-15/M16 Dedicated .22 LR Barrel
looked like a very nice barrel for the price, with the promise of better accuracy with the 1 in 16" twist rate common in .22 LR rimfire rifles.

How To Build an AR-15 .22 Rifle Parts PictureYou can see in the picture here to the left all the parts I used to build my .22 Rifle Upper,
the CMMG conversion kit came with a chamber adapter for a .223 barrel, (not shown) and the CMMG barrel came with an adapter for .22 which I have changed out on the bolt in the picture.
Since I sold off my old upper, I didn't have any parts to reuse, so I had to purchase all the parts here in this picture. You may want to re-purpose some of the parts you have on your .223 cal upper, and that is the great part of this build, all the parts are interchangeable with standard mil-spec AR-15 parts.
If you are using a .223 upper, the barrel gets replaced, the gas tube gets removed, and the bolt gets replaced with the conversion bolt.
If you are building from the ground up as I did, consider our Leapers UTG Free-Float Quad Rail System for sale above.
By using the Free Float Quad Rail, you will not need a Delta-Ring Assembly or a HandGuard Cap.
You will also need a Front Sight or a Gas Block, not for gas in this case but rather to mount your front sight to.
The CMMG Barrel is not cross drilled for an A2 Front Sight, and I wanted a gas block anyway since I was planning on using optics and could always add a clamp-on flip-up fromt sight later.
The Leapers UTG Quad Rail Gas Block we sell I can recommend without hesitation. Strong with Excellent Machining and a great Hard Anodized finish, it fits .750" barrels and has 2 set screws instead of one like many have, and it too is Made in the USA!

Next, we will be discussing the tools you will need to assemble your AR-15 .22 Rifle conversion.AR-15 Tools    -Click to Enlarge-

To install or remove a Barrel from a Receiver, you will need an Upper Receiver Action Block.
I use Brownells Upper Receiver Action Block as shown in the picture, and have found it to be sturdy and very satisfactory. The Heavy Duty Blocks surround your Receiver inside and out so you can firmly clamp it in a vise without risk of crushing, twisting or distorting it. I use hardwood blocks in my vise to protect the Action Block from damage from the knurling in the vise jaws.
You will also need some kind of wrench, there are many on the market with so many configurations it's like buying a Swiss Army Knife, but for this job you really only
need a AR-15/M16 Combination Wrench.
Installing the barrel is easy and straight forward. First, Lubricate your receiver threads with a good grease or anti-seize,
I like Rig Universal Gun Grease, and I put a light coat inside and out of the receiver threads, barrel nut and barrel extension.
The Barrel Nut needs a minimum of 35 ft lbs of torque, and up to a maximum of 80 ft lbs, so somewhere between those points we need to line up our gas tube holes.
The conversion barrel doesn't use a gas tube, but the Free Float Hand Guard depends on it's alignment for proper alignment of the rails.
After installing the barrel nut, the Full Float Quad Rail slides on and is held in place with 4 screws included in the hardware kit.
Make sure to put a drop of Blue Locktite on the screws and snug down evenly.
Slide the Quad Rail Gas Block on the barrel and level it to the upper receiver, put a drop of Locktite on the clamp screws and snug them down too.

Last, install the A1 Flash Hider, use a Barrel Vise or Hardwood Blocks in a vise and lightly tighten it on the barrel.
Install the Charging Handle and CMMG Bolt and you are ready to mount the Upper Receiver to the Lower.

  I have had this gun for a year now, and I wanted to do this video to show how easy it was to assemble a Dedicated .22 Cal AR-15 Upper.
The CMMG Conversion has worked flawlessly for me and the CMMG WASP Barrel is quite accurate. The whole thing is topped off with a Rimfire Optimized Nikon P-22 2-7X32 with BDC 150 Reticle that not only looks good with the matching AR Platform Rings, but is clear and easy to use.
I have had so much fun with this gun that it has achived Favorite Gun Status in my book.
If you talk to the folks at CMMG or Nikon, tell them Lance sent you, and I Promised that their products would not disappoint.
If you enjoyed this article, drop me a line at Lance@TriggerShims.com and let me know.
TriggerShims.com is a Sales Affiliate with Brownells because we believe they have the best products, service  and guarantee anywhere.
* This CMMG Conversion Kit is Available through Brownell's

AR-15 Dedicated .22 Caliber Upper Receiver Assembly Video



These Magazines are available at BrownellsClick to go to Brownells
Click on the Picture to go to Brownells

The next-generation PMAG GEN M3 is a 30-round 5.56x45 NATO (.223 Remington) polymer magazine for AR15/M4 compatible weapons. The next-generation PMAG Window GEN M3 features transparent windows to allow rapid visual identification of approximate number of rounds remaining.

Brownells AR15-Builder.com



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