The DEAD AIR THRD ADPTR FN 5.7 1/2X28 is an essential accessory designed to enhance your Mask-HD experience. This precision-engineered thread adapter ensures seamless compatibility and optimal performance with your FN 5.7 firearm. Crafted for reliability and durability, it features a 1/2X28 thread pitch, making it the ideal choice for precision shooters seeking to improve their shooting setup. Compatible with FN 5.7 1/2X28 thread pitch Elevate your shooting experience with the dependable DEAD AIR THRD ADPTR.