CMMG Mk3 Upper Receiver Assembly .308 Armor Black

Name: CMMG Mk3 Upper Receiver Assembly .308 Armor Black
Brand: CMMG
Availability: InStock

CMMG · Upper Receiver

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CMMG Mk3 Upper Receiver Assembly .308 Armor Black

Best price

$330.99at MidwayUSA

In stock checked Nov 14, 2026

Buy at MidwayUSA

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Fits and works with

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

Specifications

Manufacturer: CMMG

Compatibility

Caliber: .308 / 7.62
Platform: AR-10

Materials and features

Color: Black

Where to buy

Store	Price	Availability	Buy
MidwayUSA Best price	$330.99checked Nov 14, 2026	In stock	Buy at MidwayUSA
AR15Discounts 5% off	$324.95checked Nov 14, 2026	Check store	Buy at AR15Discounts
Dirty Bird	$324.95checked Nov 14, 2026	Check store	Buy at Dirty Bird
OpticsPlanet	$279.99Salechecked Nov 14, 2026	Out of stock	Buy at OpticsPlanet

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: $324.95 at MidwayUSA. Dashed line = out of stock. Tracking since Oct 14, 2026.

Show the prices as a table

Store	Latest	Lowest	Highest
AR15Discounts	$324.95	$324.95	$324.95
Dirty Bird	$324.95	$324.95	$324.95
MidwayUSA	$330.99	$324.95	$330.99
OpticsPlanet	$279.99	$279.99	$279.99

Since Oct 14, 2026.

About this part

The CMMG Mk3 Upper Receiver Assembly .308 Armor Black is a .308 / 7.62x51 upper receiver from CMMG. It's sold by 4 stores (1 in stock), from $279.99 to $330.99. The lowest in-stock price in the last 30 days was $324.95 at MidwayUSA.

From the manufacturer

CMMG Mk3 Upper Receiver Assembly .308 Armor Black. Chambered in 5.56x45mm this upper group is a staple for any collection and comes ready to pair with the AR15 lower group of your choice. Specifications for CMMG Mk3 Upper Receiver Assembly: Manufacturer: CMMG Color: Armor Black Finish: Cerakote Fabric/Material: Billet 7075-T6 Aluminum Caliber: .308 Winchester Gun Make: CMMG Gun Model: CMMG Mk3 Condition: New Package Contents: CMMG Mk3 Upper Receiver Assembly What firearm models does the manufacturer say CMMG Mk3 Upper Receiver Assembly is compatible with? The manufacturer says that CMMG Mk3 Upper Receiver Assembly is compatible with CMMG Mk3CMMG 38BA22E-AB: Mk3 Upper Receiver Assembly .308 Armor Black