SKU 51655230855 Brand Palmetto State Armory UPC 51655230855 DETAILS Barrel Length: 10.3" Barrel Material: PSA CHF Chrome Moly Vanadium Gas System: Pistol Barrel Finish: Phosphate Chrome Lined: Yes Muzzle Thread: 5/8-24 Chamber: 300BLK Twist Rate: 1:5 Barrel Extension: M4 Diameter at Gas Block: .875 Gas Block Type: F-Marked FSB Muzzle Device: Sabre Plan B Flash Hider - Black Nitride Receiver Material: Forged 7075 T6 Receiver Type: M4 T-Marked Hand Guard Type: Quad Rail - FDE Anodized