Home / NFA Accessories / YHM RIFLE THREAD PROTECTOR .640 OD 1/2X28 “SILENCERCO THREADED RIFLE SPACER 1/2X28” has been added to your cart. View cart Out of stock YHM RIFLE THREAD PROTECTOR .640 OD 1/2X28$16.25 Out of stock Want to be notified when this product is back in stock? Notify me UPC: 816701013917 SKU: YHM-3412-B Categories: Muzzle Devices - Non Suppressor Mount, NFA Accessories Product ID: 9987 Related products Dead Air Fixed Barrel Spacer DA409 $39.00 Add to cart RUGGED TI FRONT CAP 7.62 $68.89 Add to cart DEAD AIR Sandman Enhanced Brake $119.00 Add to cart RUGGED FLASH HIDER FRONT CAP 7.62 $80.60 Add to cart