A.R.M.S. Swan Sleeve

This new A.R.M.S. Swan Sleeve is an optical sight rail for bench rest shooting. It will fit Mil-spec flattops 5.56 M16/M4/AR-15/AR-10 7.62 rifles or carbines. Overall length is just under 14". The Optical Sight Rail(OSR) is designed for those people who want optimum optic accuracy without the need for a built-in rear combat iron sight, but need the other capabilities as found on the #38 Ex/S-Ex Military SWAN® Sleeve. This item can raise and lengthen your flat-top receiver while totally protecting the rifles factory dovetails. The #36's allow super low mounting for bench rest shooting while extending the standard receiver to better accommodate all lengths of optics. This is A.R.M.S. #36 OSR Swan Sleeve.