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CMMG MK3 .308 Win AR-10 Stripped Lower Receiver - Armor Black

CMMG MK3 .308 Win AR-10 Stripped Lower Receiver - Armor Black

CMMG · Lower Receiver

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Best price

$274.99at MidwayUSA

In stock checked Oct 31, 2026

Buy at MidwayUSA

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Where to buy

StorePriceAvailabilityBuyAdd to build
MidwayUSA Best price $274.99checked Oct 31, 2026 In stock Buy at MidwayUSA
Palmetto State Armory $270.99checked Oct 31, 2026 Check store Buy at Palmetto State Armory
AR15Discounts $324.95checked Oct 31, 2026 Check store Buy at AR15Discounts
Dirty Bird $324.95checked Oct 31, 2026 Check store Buy at Dirty Bird

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

Lowest in-stock price in the last 30 days: $274.99 at MidwayUSA. Dashed line = out of stock. Tracking since Oct 28, 2026.

Show the prices as a table
StoreLatestLowestHighest
AR15Discounts$324.95$324.95$324.95
Dirty Bird$324.95$324.95$324.95
MidwayUSA$274.99$274.99$274.99
Palmetto State Armory$270.99$270.99$270.99

Since Oct 28, 2026.

About this part

The CMMG MK3 .308 Win AR-10 Stripped Lower Receiver - Armor Black is an AR-10 stripped lower receiver from CMMG. It's sold by 4 stores (1 in stock), from $270.99 to $324.95. The lowest in-stock price in the last 30 days was $274.99 at MidwayUSA.

Fits and works with

Caliber
.308 / 7.62x51 · Shop matching ammo

Specifications

Manufacturer
CMMG
Color
Black
Type
Stripped
Platform
AR-10

From the manufacturer

Elevate your AR-10 build with the CMMG MK3 .308 Win Stripped Lower Receiver in Armor Black. Crafted for precision and reliability, this essential component serves as the foundation for your custom .308 Winchester rifle, ensuring seamless compatibility and superior performance in demanding shooting scenarios. Key Features Forged 7075-T6 Aluminum Construction: Provides exceptional strength and durability to withstand the rigors of high-powered .308 Win rounds, reducing wear and extending the lifespan of your firearm. DPMS LR-308 Gen 1 High Pattern Design: Ensures broad compatibility with popular AR-10 parts, allowing you to mix and match components from various manufacturers without compatibility headaches. Flared Magwell and Integrated Trigger Guard: Facilitates faster, smoother magazine changes and enhanced safety during operation, ideal for competitive shooting or tactical applications. Mil-Spec Machining: Precision-engineered to military specifications for a flawless fit with standard AR-10 uppers, buffers, and accessories, minimizing assembly issues. Armor Black Cerakote Finish: Offers superior corrosion resistance and a sleek, professional appearance that resists scratches and environmental damage. Specifications Caliber Compatibility: .308 Winchester (AR-10 platform) Material: 7075-T6 Forged Aluminum Finish: Cerakote Armor Black Weight: 14.08 oz Dimensions: Length: 10.75 in, Width: 4.25 in, Height: 2.5 in Pattern: DPMS High (Gen 1) Why Choose the CMMG MK3 Stripped Lower Receiver? Building a reliable AR-10 starts with a quality lower receiver, and the CMMG MK3 addresses common builder pain points like part incompatibility and subpar durability. Its robust design supports heavy-recoiling .308 Win setups, delivering consistent performance whether you're hunting, target shooting, or training. Unlike generic alternatives, this lower's precision machining ensures tight tolerances, reducing play between upper and lower for improved accuracy and control. Invest in CMMG's proven engineering to create a rifle that performs when it counts. Frequently Asked Questions Q: Is the CMMG MK3 lower compatible with standard AR-10 uppers? A: Yes, it follows the DPMS LR-308 Gen 1 high pattern, making it compatible with most .308 AR-10 uppers and parts kits available on the market. Q: What makes this lower suitable for .308 Winchester builds? A: The reinforced 7075-T6 aluminum forging is specifically engineered to handle the increased pressure and recoil of .308 Win cartridges, providing a stable base for powerful rifle configurations. Q: Does this stripped lower require any special tools for assembly? A: No, it adheres to mil-spec dimensions, allowing standard AR-10 tools and parts for straightforward installation of lower parts kits, stocks, and grips. Ready to start your custom AR-10 build? The CMMG MK3 .308 Win Stripped Lower Receiver in Armor Black is the reliable choice for shooters who demand quality and performance. Secure yours today and take your firearm customization to the next level.

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$274.99 at MidwayUSA
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