Home / Accessory-Silencer Accessories / Dead Air Armament FN 5.7 THREAD ADAPTER 1/2X28 You cannot add "Gemtech THREAD PROTECTOR M13.5X1 LH" to the cart because the product is out of stock. 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 Gemtech THREAD PROTECTOR 1/2-28 RF $1800 Sale! Rugged Suppressors R3 FLASH HIDER M18X1 $10000 $8715 Sale! Rugged Suppressors R3 FLASH HIDER 3/4X24 $10000 $8715 Sale! SIG SAUER MUZZLE BRK CL 7.62MM 25 DEG $17999 $16957