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308 AR Gunbuilder's Lower Parts Kit
308 AR Gunbuilder's Lower Parts Kit
308 AR Gunbuilder's Lower Parts Kit
308 AR Gunbuilder's Lower Parts Kit
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CMMG - 308 AR Gunbuilder's Lower Parts Kit

3 Reviews
308 AR Gunbuilder's Lower Parts Kit
Brownells #
100014540
MFR #
38CA61A
UPC
815835015415
$43.99 $49.23
Coupon Code
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Standard Shipping Estimated Delivery
Estimated delivery: Oct 1
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International purchase information

Specifications
Quantity:
1
Make Model Fit:
AR-308.Universal
Restriction
Gun Part Restrictions:
Yes
Prop 65 restriction:
Warning! Cancer and Reproductive Harm. Www.p65warnings.ca.gov
View US State Restrictions
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International purchase information

What is the CMMG - 308 AR Gunbuilder's Lower Parts Kit?

The 308 version includes LR308 takedown and pivot pins as well as an improved bolt catch. The 308 kits also include a bolt catch screw in place of the AR-15 pin.


INCLUDES:
  • Takedown pin
  • Receiver pivot pin
  • Takedown pin detent (2)
  • Takedown pin detent spring (2)
  • Hammer and trigger pin (2)
  • Safety selector
  • Selector detent
  • Magazine catch
  • Magazine catch spring
  • Magazine release button
  • Bolt catch
  • Bolt catch plunger
  • Bolt catch spring
  • Bolt catch spring pin
  • Buffer retainer
  • Buffer retainer spring

See all of our AR15s and AR15 parts here.

Gun Part Restriction
Gun Parts have restricted shipping to CA.

Prop 65WARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov

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GUNBUILDER'S LOWER PARTS KIT FOR .308 AR LOWER REVIEWS

2.7
3 Reviews
5 Stars
0%
4 Stars
0%
3 Stars
67%
2 Stars
33%
1 Stars
0%
3
OK kit but not for Aero M5
Used this kit a couple of times with good results but when using on Aero M5 the mag catch is too short the front pin too tight, other have said the safety also doesn't fit right but I used a different item.
by Pete on March 18, 2025
Verified Purchase
Was this review helpful? 1
3
Wrong magazine catch
This is a 308 build kit but it came with the shorter ar15 magazine catch which i was able to make work but barely catches enough threads to hold.
by NaPalm on September 19, 2018
Was this review helpful? 1
2
CMMG LOWER
Found this kit to be of very poor quality. Pivot pin andtakedown pin did not fit Aero Precision M5 lower an safety selector needed rework to function properly. Initial price was good but new pins, rework time offset any advantage on price.
by Mark on January 12, 2019
Was this review helpful? 2
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