• The CMMG Gun Builder’s AR-15 Lower Parts Kit allows you to pay for only the parts that you need and nothing you don’t

CMMG Gun Builders AR-15 Lower Parts Kit - Mil-Spec, High-Quality Construction, Made In USA

$44.99

Discount Price:

$34.98

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Fast and Accurate Order Processing

We offer standard, 3 day express, 2 day express, and overnight express shipping options for your convenience. If you place your order Monday - Friday by 2:00 PM EST using one of our express shipping options, your order will be processed and shipped the same day it is placed!

Applies to delivery within the 48 contiguous states only.
Shopper Award

  • The CMMG Gun Builder’s AR-15 Lower Parts Kit allows you to pay for only the parts that you need and nothing you don’t
  • This kit includes most of the necessary parts to build up your lower group except the commonly upgraded parts
  • All the parts included in this kit meet or exceed military specifications and are 100 percent made in the USA


The CMMG Gun Builder’s AR-15 Lower Parts Kit allows you to pay for only the parts that you need and nothing you don’t. This kit includes most of the necessary parts to build up your lower group except the commonly upgraded parts. It includes the HD takedown pin, HD receiver pivot pin, receiver pivot detent spring, takedown/receiver pivot detent (2), takedown detent spring, bolt catch, bolt catch plunger, bolt catch spring, bolt catch pin, buffer retainer, buffer retainer spring, hammer and trigger pin (2), magazine catch, magazine spring, magazine release button, safety selector, selector detent and the selector detent spring. All the parts included in this kit meet or exceed military specifications and are 100 percent made in the USA. NOTE: To complete your AR-15 lower receiver, you’ll 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 butt stock to the contents of the kit.

52 CM5408


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