Arsenal SAM7R-62: Arsenal SAM7R-62 7.62x39mm Semi-Auto Rifle with AK-351 Muzzle Brake milled and forged receiver FM-922EUS Fime Group enhanced fire control group 16.3 chrome lined hammer forged barrel 14x1mm left-hand threads removable muzzle brake cleaning rod bayonet lug black polymer furniture intermediate length buttstock scope rail one 10 round magazine sling oil bottle and cleaning kit. - Caliber: 7.62 x 39 mm - Total length: 36.5 in. (927 mm) - Barrel length: 16.33 in. (415 mm) - Rifling: 4 grooves - Twist rate: 1:9.44 (1 in 240 mm) - Weight w/o magazine: 8 lbs (3.67 kg) - Muzzle velocity: 2329 fps (710 m/s) - Effective range: 437 yds (400 m) - Maximum range: 1480 yds (1350 m) - Rate of Fire: 40 rds/min (practical) - Receiver: Milled Receiver - Fire Control: Fime Enhanced Trigger - Front: 14x1mm Left Hand Thread/AK-351 Muzzle Brake