Clamps your GoPro to any Gun Barrel (Pellet gun and up) Shotguns, Rifles, Paintball Guns (any Gage any Caliber) Low Profile does not obstruct aiming view Fixed mount will not move during recoil!!! Always parallel to barrel! No Tools required (on and off in seconds) Move it to your buddies gun then make fun of him with he misses!!! Allows for 3 mounting locations Barrel Scope Picatinny Rail Works with any GoPro Model Hero 1,2,3 or 4 Clamping Range .5in. up to 1.25 (Will clamp to any size Barrel) Don't be afraid to torque it nice and tight. You can't strip it! Made in the USA! (I don't do China!)