Resolute Mk4 5.56 NATO Assembled Upper Rcvr 16.1" Bbl Black
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specifications

Manufacturer:

CMMG

Color:

Black

Type:

Complete

Platform:

AR-15

Caliber:

5.56 mm NATO

Barrel Length:

16.1"

    Resolute Mk4 5.56 NATO Assembled Upper Rcvr 16.1" Bbl Black

    Caliber Manufacturer Color Weight Merchant Price Merchant URL
    5.56 mm NATO 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 RESOLUTE MK4 5.56X45MM NATO ASSEMBLED UPPER RECEIVER Top off your next build with this RESOLUTEA(R) Mk4 Upper Group. Chambered in 5.56x45mm, this upper group is a staple for any collection. This upper group does NOT include BCG or charging handle. SPECS Platform: Mk4 Caliber: 5.56x45mm Operating System: Direct Impingement Barrel Length: 16.1" Barrel Twist: 1:7 Barrel Contour: MT Barrel Material: 4140CM, SBN Muzzle Device: CMMG A2 Flash Hider Muzzle Thread: 1/2 x 28 Gas Port Location: Mid Gas Block: Non-Adjustable 0.750" Upper Receiver: Billet 6061 T6 Alu Mfg: Cmmg

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