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CMMG, Inc Firing Pin Retainer Up to 67% Off — 2 models

CMMG, Inc Firing Pin Retainer,AR15 55BA4C5
CMMG, Inc Firing Pin Retainer,MK3 38BA4A9
CMMG, Inc Firing Pin Retainer,AR15 55BA4C5
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CMMG, Inc Firing Pin Retainer,AR15 55BA4C5
CMMG, Inc Firing Pin Retainer,MK3 38BA4A9
2 of 2 images
CMMG, Inc Firing Pin Retainer,MK3 38BA4A9

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Questions & Answers
Does this work in a large frame 308 bolt carrier for an AR10 Expert Answer

The CMMG, Inc Firing Pin Retainer model for the CMMG MK3 should work with any DPMS pattern BCG.

by Hunter, Gear Expert, July 28, 2022
Will a firing pin retainer for an M16 also fit the bolt carrier for a CMMG Mk 47? Expert Answer

You will need to verify that directly with CMMG as they make no mention of whether the bolt carrier group for the Mk47 uses their Mk3 retainer or a standard AR-15 retainer.

by Armando R., Gear Expert, December 23, 2019
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review These are pins by CNS, Verified Owner, February 11, 2024
These pins seem OK. I bought them for spares and I have not used them yet.
1/1 found this helpful
Helpful Positive Review Does what it's supposed to. by M. Bethmann, Verified Owner, September 9, 2021
It's a standard firing pin retainer. I've used this in both full auto and semi auto profile bolt carriers (not that it should make a difference, but it's worth mentioning) It retains the firing pin, and doesn't come loose after firing. Great pin.
1/1 found this helpful
Helpful Negative Review Hard to get into hole by Plentysoda, Verified Owner, March 16, 2022
The tip of these is too dull, it keeps opening at the end as well, so I had to file it down into order for it to get close and I have to hammer it in. Imagine SHTF and you'll hear me sitting there hammering this thing in. Sigh.
3/3 found this helpful
Most Recent Reviews Retainer pin by JL, Verified Owner, April 18, 2025
Always good to have a spare. Quality appears good and delivery was quick.
Most Recent Reviews cotter pin by Charlie, Verified Owner, January 23, 2025
The cotter worked as expected and shipped fast. It is as described ans sturdy.
Most Recent Reviews Highest quality product by Andy, Verified Owner, September 29, 2024
I needed a new retaining pin and I was very happy to see this product from CMMG...the BMW of ARs,... for less than a buck. The pin is in perfect condition with the legs close together for easy installation. Nice packaging too Highly recommended.
Read All 10 Reviews
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Product Info for CMMG, Inc Firing Pin Retainer

Firing Pin Retainer, AR15/M16image

Specifications for CMMG, Inc Firing Pin Retainer:

Manufacturer: CMMG
Gun Type: Rifle

Package Contents:

  • CMMG, Inc Firing Pin Retainer

This product is compatible with the following gun models: AR-15, CMMG Mk3

CMMG, Inc Firing Pin Retainer Orderable Models

List of Orderable Models

CMMG, Inc Firing Pin Retainer, MK3, 38BA4A9 , MPN: 38BA4F0 , UPC: 810046232033 , Code: 2CM-ABA-FRPRTN-38BA4A9
CMMG, Inc Firing Pin Retainer, AR-15, 55BA4C5 , MPN: 55BA4C5 , UPC: 815835017341 , Code: 2CM-ABA-FRPRTN-55BA4C5
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