CMMG AR15 Gun Builders Lower Parts Kit

This Gun builders kit includes most of the necessary parts to build up your lower group except the commonly upgraded parts. Does not include Trigger Guard, Fire Control Group, or pistol grip.

In stock

SKU 55CA601

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American Owned and Operated


20+ Years In Business

Returns Accepted

Ships from Pennsylvania


AR15 Rifle
AR15 Parts
US Army Surplus Header


  1. CMMG AR15 Gun Builders Lower Parts Kit
  2. For Builds or Repairs
  3. All Parts Meet or Exceed Mil-Spec
  4. UPC: 815835015408

More Information

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CMMG AR-15 Lower Parts Kit

Customer Reviews

Review by Deron Q.
Verified Buyer
I bought two of these lower parts kits. Using one for repair, other is spare.
Good parts good price very happy
Review by Glendale F.
Verified Buyer
Worked great, everything you need is ther
Good thing to have
Review by Adalberto M.
Verified Buyer
Nice to have back up parts just in case you screw up.
Ok parts kit, but could be better.
Review by Javiel A.
Verified Buyer
Parts kit was ok for the most part. The bolt release roll pin is junk though. I have done many lowers and have the correct roll punches. But this pin mushroomed after just a few taps. Also, kit would have been better if it had a trigger guard included, but other than that, everything fit ok. For the novice, it would have been nice if the parts card was printed on the back side so that you could easily match the parts if you leave them in the clam-shell package.
Review by Irma S.
Verified Buyer
Second build I've used this on. Fits and functions perfectly
A-1 Spare Part 5*
Review by Jerimey S.
Verified Buyer
5 Star
inner guts
Review by Naman T.
Verified Buyer
great stuff great price and service
Review by Finley D.
Verified Buyer
This kit gave me 3 take down pin detents when it was supposed to be 2 with a selector detent that is different. I dont have the selector detent with the flat bottom
Great price, great parts
Review by Colby U.
Verified Buyer
May have been on sale, but they're great parts and the fact they are labeled really helped me being a new to the lower building game
Great quality parts kit from a top notch company
Review by Carlo A.
Verified Buyer
The pieces went together on the lower like they are supposed to. One my next build I will be using the same kit again. I really like that I could buy CMMG parts cause its letting me support a company out of my home state of Missouri

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