DEAD AIR XENO XERO .578X28 .45 CALThe Dead Air Xeno Xero . 578x28 . 45 Cal is a lightweight, minimalist muzzle device designed for . 45 caliber firearms. It serves as an effective thread protector on its own and provides a secure mounting point for Xeno compatible suppressors. This device is part of the Xeno mounting system, offering a compact solution with exceptional repeatability and solid return to zero for precision shooters. Features Specs: Thread pitch: . 578x28 Caliber: . 45