Semi Automatic Rifle - 10mm Auto - 17 Rounds - 15 Threaded Barrel - Threaded Muzzle 9/16x24 TPI - Button Rifled 1:16 Twist - Accepts Standard GLOCK Magazines - Straight Blowback Operation - Ambidextrous bolt configurable for left or right hand - Ambidextrous ejection configurable for left or right side - 13 Freefloat KeyMod Handguard - Picatinny Top Rail Machined Into Receiver - Machined from 6061 T6 Aluminum - Standard M4 Buffer Tube 6 Position Buttstock and Pistol Grip - Utilizes Standard AR-15 Furniture and Trigger Components - 31-34.25 Overall Length - Black Finish