Springfield Armory LevAR Ratcheting Charging Handle with 7.25in Overall Length for AR-15. Carbine instructors train students to slam the butt of the gun against the ground to free stuck casings causing potential damage to your firearm. The patented LevAR ratcheting charging handle gives users a 3:1 mechanical advantage over traditional charging handles and clears stuck cartridges with ease while keeping your muzzle pointed safely down range. Simply deploy the ratcheting arm and pull back to eject the casing. The LevAR installs in seconds and is compatible with any standard AR-15 upper receiver. Package Contents: Springfield Armory LevAR Ratcheting Charging Handle Manual Instruction What firearm models does the manufacturer say Springfield Armory LevAR Ratcheting Charging Handle is compatible with? The manufacturer suggests that Springfield Armory LevAR Ratcheting Charging Handle is compatible with AR-15Springfield Armory AR5430LEVARF LevAR Ratcheting Charging Handle With 7.25 OAL