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CMMG
Overview
The CMMG Inc Barrel Sub-Assembly is designed for .22 LR builds, featuring a 4.5-inch barrel length and a medium taper profile that balances weight and rigidity for enhanced performance. This blowback gas system is specifically tailored for reliable cycling and smooth operation, making it ideal for those looking to build a compact and efficient firearm. This type of barrel is commonly found in lightweight, tactical-style builds that prioritize maneuverability and ease of use.
Specifications
Price and stock
The CMMG Barrel Sub-Assembly Medium Taper 22LR 4.5in 4140CM was hard to find in September 2026, in stock on only 6 of the 22 days we checked, and today only CMMG has it in stock. It dipped to $133.99 at Optics Planet for a stretch in September 2026, under its usual $143.08, so sales do come around. Buying today, the lowest price is $149.95 at CMMG, above September's low of $133.99, so a better deal may come back.
Prices checked · refreshed daily across 37 retailers
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