CMMG 57DF1C7 Barrel Sub-Assembly 5.7x28mm 10.40" 1:9 Twist Medium Taper Threaded - Fits PS90 SBR

The CMMG 57DF1C7 Barrel Sub-Assembly is a factory-threaded replacement barrel chambered in 5.7x28mm, purpose-built for FN PS90 SBR platforms. Constructed from 4150 chrome moly vanadium with a chrome-lined bore, this drop-in unit lets shooters re-barrel or build out a pistol/SBR-class 5.7x28mm firearm on the proven PS90 pattern.

The barrel measures 10.40" long and uses a 1:9 twist to stabilize the full range of 5.7x28mm projectiles. It carries a medium taper profile in a pistol-length configuration and is finished in black nitride for corrosion resistance. A factory-threaded muzzle accepts compatible muzzle devices or suppressors, giving builders flexibility on the host's business end.

Sights are not included. This listing is for the barrel sub-assembly only and is intended as a direct replacement or build component for PS90 SBR-pattern firearms. It is not a complete firearm or a serialized receiver.