CMMG’s PS90 SBR threaded barrel is constructed of 4150 chrome moly vanadium with chrome lining and a maganese phosphate coating. It is 10.4″ long and is chambered for FN 5.7x28mm caliber.
CMMG 57DF1C7 Barrel Sub-Assembly5.7x28mm 10.40″ Black Nitride Finish 416R Stainless Steel Material Pistol Length with Medium Taper Profile for PS90 SBR
