AR-308 Mk3 Firing Pin

Name: AR-308 Mk3 Firing Pin
Brand: CMMG
Availability: InStock

CMMG · Upper Parts

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Best price

$12.49at GunMag Warehouse

In stock Lowest in 30 dayschecked Nov 13, 2026

Buy at GunMag Warehouse

Compare 8 stores

Fits and works with

Caliber: .308 / 7.62x51 · Shop matching ammo
Bolt: AR-10 (.308 / 6.5 CM) · Bolt carrier groups

Specifications

Manufacturer: CMMG
Platform: AR-10

Where to buy

Store	Price	Availability	Buy
GunMag Warehouse Best price	$12.49checked Nov 13, 2026	In stock	Buy at GunMag Warehouse
OpticsPlanet	$14.99Salechecked Nov 13, 2026	In stock	Buy at OpticsPlanet
Palmetto State Armory	$14.49checked Nov 13, 2026	Check store	Buy at Palmetto State Armory
Natchez	$14.49checked Nov 12, 2026	Check store	Buy at Natchez
CMMG	$14.95checked Nov 13, 2026	Check store	Buy at CMMG
GrabAGun	$15.79checked Nov 12, 2026	Check store	Buy at GrabAGun
Brownells 17.76% off · ends Nov 15 · exclusions apply	$14.31checked Nov 13, 2026	Out of stock	Buy at Brownells
MidwayUSA	$16.99checked Nov 13, 2026	Out of stock	Buy at MidwayUSA

Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.

Price history

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Lowest in-stock price in the last 30 days: $12.49 at GunMag Warehouse. Dashed line = out of stock. Tracking since Sep 28, 2026.

Show the prices as a table

Store	Latest	Lowest	Highest
Brownells	$14.31	$14.31	$14.31
CMMG	$14.95	$14.95	$14.95
GrabAGun	$15.79	$15.79	$15.79
GunMag Warehouse	$12.49	$12.49	$12.49
MidwayUSA	$16.99	$14.95	$16.99
Natchez	$14.49	$14.49	$14.49
OpticsPlanet	$14.99	$14.89	$14.99
Palmetto State Armory	$14.49	$14.49	$14.49

Since Sep 28, 2026.

About this part

The AR-308 Mk3 Firing Pin is an AR-10 upper part from CMMG. It's sold by 8 stores (2 in stock), from $12.49 to $16.99. The lowest in-stock price in the last 30 days was $12.49 at GunMag Warehouse.