Home / NFA Accessories / YHM RIFLE THREAD PROTECTOR .640 OD 1/2X28 “SILENCERCO O-RING BOOSTER PACK” 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 MAGPUL DAKA CAN 2.0 $18.95 Select options This product has multiple variants. The options may be chosen on the product page SILENCERCO DELTA THREAD PROTECTOR 1/2X28 $16.15 Add to cart Out of stock SILENCERCO BRAVO ASR MOUNT $137.70 Read more RUGGED FIXED BARREL SPACER $32.99 Add to cart