Home / Accessory-Silencer Accessories / Dead Air Armament FN 5.7 THREAD ADAPTER 1/2X28 View cart “SilencerCo O-RING BOOSTER PACK” has been added to your cart. Dead Air Armament FN 5.7 THREAD ADAPTER 1/2X28$4500 Out of stock SKU: DA422 Category: Accessory-Silencer Accessories Product ID: 33718 Description Description For FN 5.7Requires aftermarket barrelWill not work on OEM barrel Related products Sale! Rugged Suppressors R3 FLASH HIDER 3/4X24 $10000 $8715 Sale! Rugged Suppressors TITANIUM FRONT CAP 7.62 $10000 $8715 Sale! Dead Air Armament SANDMAN 5.56 FRONT CAP $6900 $6042 Sale! SilencerCo 3-LUG MUZZLE DEVICE 9MM 5/8X24 $8900 $8211