Ptr pdwr 51p pistol.308 8.5" 20rd black FEATURES:-Caliber: .308 (also accepts 7.62 x 51)-Barrel: 8.5" bull barrel-Twist: 1:10"-Polymer grip-Classic style polymer handguard-One 20-round magazine -Overall length: 23.5"-Weight: 7.9 lbs Other Features: Flash hider, polymer trigger group, welded picatinny scope mount, black polymer handguard, ar buffer compatible end cap paddle and push button magazine release, 5/8x24 thread on muzzle, delayed blowback roller-lock system