CMMG Gunbuilder’s Lower Parts Kit – 5.56 – No Grip or Fire Control Group


Out of stock

Get notified when this product is back in stock

SKU: 55CA601 UPC: 815835015408

Product Description

CMMG 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, and pistol grip. All parts meet or excede mil-spec.

The CMMG Gunbuilder’s Lower Parts Kit allows you to pay for only the parts you need and nothing you don’t. To complete your AR-15 lower received you will need to add your choice of complete fire control/trigger group, trigger guard, pistol grip assembly, buffer, buffer spring, receiver extension, receiver end plate, castle nut, and buttstock to the contents of this package.

All the parts included in this package meet or exceed military specifications and are 100% made in the USA.




Technical Information

Firearm Compatibility

Catalog Location

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 visit

Customer Reviews

Based on 2 reviews
Bradley C.
Great kit.

All parts had perfect fitting. Solid parts. I recommend.

Timothy N.
The safety spring sucks

The spring is super stiff kinda looked corroded when I got it. Everything else worked fine