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
September 2026 on GunPartPicker
CMMG Upper Group Resolute MK4 .22Lr 16.1in 1-16 Twist 1/2 X 28 TPI 24in Armor Black ranked #168 of the 615 upper receivers builders added on GunPartPicker in September 2026. Builders have been adding it to their builds on GunPartPicker since May 2026. All time, it ranks #241 of the 1,683 upper receivers builders have added.
It was hard to find in September 2026, in stock on only 4 of the 8 days we checked, and today only Optics Planet has it in stock. Prices barely moved in September 2026, holding around $621.82, so there haven't been real sales lately. Buying today, the lowest price is $689.99 at Optics Planet, above September's low of $621.82, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Frequently Built With
The part most often added in each category by the builds that include this one
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Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
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