Our .17 HMR rifle features a standard 18 stainless steel button-rifled 1:10 twist barrel with straight flutes muzzle threaded 1/2-28 TPI RH for standard .223/5.56 muzzle devices. The weapon features a blowback operating system. The standard trigger is a military-style AR-15 trigger. Standard handguard is our G10 composite non-vented mid-length free-floating tube. Standard butt stock is the M4-style six-position adjustable stock. The rifle ships in a soft carry bag with two 10-round magazines. Weight of rifle is 7.5 pounds.