Features: AR15 Golf Ball Launcher, attaches to the muzzle of a AR-15/ M4/ M16 and launches Golf balls with 5.56 Blanks Screws onto the end of AR-15/ M4/ M16 barrel threads Uses 5.56 Military Blanks to launch Golf Balls. Do not use Live Ammo Launches Golf Balls to several hundred yards (400+ yrds) Thread pitch: 1/2 X 28 RH thread (AR barrel thread pitch). Steel Construction Length: 5.3" Weight: 18.1 oz