IWI US, Inc Centerfire, Suppressor, 7.62MM, 1/2X28 HUB-T Mount, Black IWS762 The IWI IWS7 silencer is a cutting-edge reduced back-pressure solution for 7.62 NATO and 7.62mm Magnum rifle calibers. Made with weapon-grade nickel alloy and stainless steel parts, and CNC laser-welded for strength, it handles the demands of short barrels and full-auto firearms while preserving the rifle's natural accuracy.