Advantage Arms 1.75x5 Suppressor: This Stainless Steel, Fully Modular Suppressor is built and designed to last the lifetime of your rifle. Our suppressor is fully modular and expandable if needed. Specifically designed for your AR-15, this 5 inch suppressor comes standard with 1/2x28 threads and a 5.56 endcap. And as with all modern suppressors, it comes with a quick-detach muzzle break which allows you to swap quickly from one rifle to another, making this your do-everything can.