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CMMG
Overview
The CMMG Barrel Sub-assembly is a 20-inch medium-profile barrel designed specifically for .22 LR caliber builds. Its blowback gas system ensures reliable cycling with minimal recoil, making it an excellent choice for both target shooting and training applications. This barrel is commonly found in builds focused on precision shooting or plinking, where accuracy and control are key.
Specifications
Price and stock
Availability is good for the CMMG Barrel Sub-assm 20 Mt 4140CM SBN 22 ARC: it was in stock at one retailer or another nearly every day in September 2026, and today 2 of the 3 retailers we track have it in stock. The best price drifted down from $249.95 to $173.19 over September 2026 without a real sale. Buying today, the lowest price is $223.99 at Optics Planet, above September's low of $173.19, so a better deal may come back.
Prices checked · refreshed daily across 37 retailers
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