CMMG Complete AR-15 Lower Receiver Parts Kit

Manufactured by CMMG
Manufactured by CMMG
139 Reviews
$54.99 $69.95

In Stock

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CMMG Lower Parts Kit for AR-15. Includes pistol grip, fire controls, springs, and pins necessary to complete stripped lower. All AR15 Lower Parts Kits now come in color coded pouches to aid in assembly.
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Weight7 Oz
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to



I always use this parts kit no matter what the build is.



I bought 2 of these LPK's on sale for two upcoming builds. I installed one already. Using a completed lower with a PSA PTAC LPK I did last year as comparison I was surprised at the quality of the CMMG. PTAC is Palmetto State Armory's no-frills economy Lower Parts Kit. The PSA PTAC LPK installed reciever had a lot of creep & gritty triggerpull. The reciever with the CMMG LPK installed had none of this. The difference is night and day.Now I am going to have to get another CMMG LPK to replace the PSA PTAC LPK.Shipping was quick and PA keeps you informed every step of the way.

Nice to have backup.


I guess it's always good to have backup. Carry this in my field bag. Just in case... Parts look to be made well, but I have not had to use them yet.

could not ask for anything better


I highly recommend this company to everyone

Awesome product!


I just did my first AR-15 build. This kit was recommended to me by a friend. First of all I liked the color coded bags. Really helped me with my first build. All components were good quality, everything fit like it should! The trigger works awesome! I have a custom AR-15 I bought before this build and the triggers are identical in feel and function. I recommend this kit, you will not be disappointed!



I like their packaging as it makes assembly easier. Great price from Primary Arms.

My first lower build.


I really liked the separated color parts bags with identification card. I didn't care for the grip which I replaced during assembly. I would definitely use a CMMG lower parts kit again.

Cheap price, cheap parts


It is what it is. A bargain for a LPK

Sorted parts bag very helpful.


It was my first build and the colored parts bags were extremely helpful. All parts were present, wich is one of the reasons I chose this kit. I read many reviews on many websites and was amazed at how many reviews for other brand kits were missing parts. Not one review anywhere for this kit mentioned missing parts. Everything went together very well and very easy except... The safety selector would not clear the rear of the trigger that goes under the safety bar. It was very slight but enough to halt installation. A few minutes with a belt sander and It was good to go. Otherwise I would give it 5 stars. I will probably use this kit again.



Item shipped fast but when I reciver was missing the bolt catch spring called cmmg and they shipped one out to me the same day will purchase cmmg products again