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CMMG
Overview
The CMMG Barrel Sub-assembly is a 16.1-inch barrel designed specifically for .40 S&W cartridges, featuring a nitride finish for enhanced durability and corrosion resistance. This barrel is compatible exclusively with the RDB bolt carrier group, ensuring seamless integration into your build. You'll commonly find this barrel in builds focused on tactical applications or personal defense, where the .40 S&W caliber is favored for its balance between stopping power and manageable recoil.
Specifications
CMMG Barrel Sub-assm 16.1 Mt 4140CM SBN 40 S&w Only Compatible With Rdb BCG
Available Merchants(1)
Prices checked
Price Alert
Price and stock
Availability is good for the CMMG Barrel Sub-assm 16.1 Mt 4140CM SBN 40 S&w Only Compatible With Rdb BCG: it was in stock at one retailer or another nearly every day in September 2026, and today the one retailer we track has it in stock. Prices barely moved in September 2026, holding around $324.95, so there haven't been real sales lately. Buying today, the lowest price is $324.95 at CMMG, which matches the best price we saw in September.
Prices checked · refreshed daily across 37 retailers
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