Strike Asm Ring Cap Multi optic Mount System, Si Strike asm om Asm Rng Cap Multi Opt Mnt Arrows Constructed of durable brass Constructed of durable brass Description DRAKE LST DOWN VEST the strike asm ring cap multi optic mount system gives you a simple and modular just about all in one solution to upgrade the functionality of the strike industries adjustable scope mount (asm) The strike asm ring cap multi optic mount system is a drop in add on for the si adjustable scope mount (asm) that gives you almost endless mounting possibilities for just about all mini micro red dot sight (mrds) footprints on the market or picatinny rail for mounting ir devices