Resolute Mk4 300blk Assembl Upper 14.5"bbl W/P&W Brake BLK
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specifications

Manufacturer:

CMMG

Color:

Black

Type:

Complete

Platform:

AR-15

Caliber:

300AAC

Barrel Length:

14.5"

    Resolute Mk4 300blk Assembl Upper 14.5"bbl W/P&W Brake BLK

    Caliber Manufacturer Color Weight Merchant Price Merchant URL
    300AAC CMMG Black None None $595.38 Brownells Add

    Prices last checked September 2026. Prices and availability change often, so confirm on the retailer's site.

    CMMG RESOLUTEA(R) MK4 300BLK ASSEMBLED UPPER RECEIVER W/P&W BRAKE The carbine upper that keeps it simple. Chambered in 300BLK, this RESOLUTE upper group's 14.5" barrel comes with the ZEROED SVD muzzle brake pinned & welded to the muzzle. This is the perfect choice when you want to go as short as possible while still meeting overall length requirements for rifle barrels, so no NFA rules or SBR registration. This upper group does NOT include BCG or charging handle. SPECS Platform: Mk4 Caliber: 300BLK Operating System: Direct Impingement Barrel Length: 14.5" Barrel Twist: 1:7 Barrel Cont Mfg: Cmmg

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