CMMG Upper Group Resolute MK4 .22Lr 16.1in 1-16 Twist 1/2 X 28 TPI 24in Armor Black
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CMMG
Overview
The CMMG Upper Group Resolute Mk4 is a complete upper receiver designed specifically for the AR-15 platform, chambered in .22 LR. With a 16.1-inch barrel and a 1:16 twist rate, this upper is optimized for stability and accuracy with lighter projectiles, making it a great choice for target shooting and training. The 1/2 x 28 thread pitch allows for easy attachment of muzzle devices, enhancing your customization options. This upper is often utilized in builds focused on rimfire performance and cost-effective shooting experiences.
Specifications
CMMG Upper Group Resolute MK4 .22Lr 16.1in 1-16 Twist 1/2 X 28 TPI 24in Armor Black
August 2026 on GunPartPicker
CMMG Upper Group Resolute MK4 .22Lr 16.1in 1-16 Twist 1/2 X 28 TPI 24in Armor Black ranked #291 of the 690 upper receivers builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since May 2026. All time, it ranks #280 of the 1,567 upper receivers builders have added.
It was in stock most days in August 2026, and today only Optics Planet has it in stock. The best price crept up from $621.82 to $705.99 over August 2026. Buying today, the lowest price is $705.99 at Optics Planet, above August's low of $621.82, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
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