The A.R.M.S. #31 Throw Lever Mount is designed exclusively for the Aimpoint Micro Sight Series and attaches to the flat top receivers with the A.R.M.S. Throw Lever. It features an easy on/off design for quick adjustments. Its rugged construction offers a non-reflective black finish, no-mar buffer pad. Mfg: A.R.M.S.,Inc Specs: A.R.M.S. Throw Lever, No-mar buffer pad, Non-reflective finish