A.R.M.S.® #63™ Throw Lever® Riser Mount Combines all the features of the #5™ with the #19™!! 100% MADE IN THE USA. Dual Throw Lever® riser mount. Quick detach mounting platform. Provides 3/4" of additional height for mounting optics with large objective lenses. The #63™ is compatible with STANAG mounts and features a see-through channel for use with iron sights. Weight: 4.4oz Length: Approx. 5" U.S. Patent No. 5276988, 7493721 & D548811