CMMG Barrel Sub-Assembly Multi Role Profile 5.56mm 12.5in 4140CM Salt Bath Nitride
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CMMG
Overview
The CMMG Inc Barrel Sub-Assembly features a 12.5-inch barrel specifically designed for the 5.56 NATO caliber, making it an excellent choice for compact builds that require maneuverability without sacrificing performance. The QPQ/Nitride coating enhances durability and corrosion resistance, ensuring that the barrel maintains its integrity under various conditions. This barrel is commonly found in short-barreled rifles and tactical setups where a shorter length is advantageous for rapid handling and transport.
Specifications
CMMG Barrel Sub-Assembly Multi Role Profile 5.56mm 12.5in 4140CM Salt Bath Nitride
Build history on GunPartPicker
Builders have been adding the CMMG Barrel Sub-Assembly Multi Role Profile 5.56mm 12.5in 4140CM Salt Bath Nitride to their builds on GunPartPicker since March 2026. All time, it ranks #241 of the 815 barrels builders have added.
Availability is good: 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 $224.95 to $143.79 over September 2026 without a real sale. Buying today, the lowest price is $199.49 at Optics Planet, above September's low of $143.79, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
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