Home / Accessory-Silencer Accessories / Dead Air Armament FN 5.7 THREAD ADAPTER 1/2X28 View cart “SilencerCo BRAVO ANCHOR BRAKE 458CAL BLK” 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 Gemtech ADAPTER MM9 FTM 1/2-28 $7500 Sale! Gemtech ADAPTER SIG MOSQUITO $4500 $4183 SilencerCo DELTA 1/2X28 THREAD SPACER $1900 Gemtech THREAD PROTECTOR 1/2-28 RF $1800