+3 BRT Thread Adapter - 1/2-28 to 5/8-24 TA-3 $15.95 In stock Quantity: 1 Add to Bag Product Details : Black River Tactical The BRT muzzle thread adapter allows the use of larger 5/8-24 threaded muzzle devices on your 1/2-28 threaded barrel. Made from Chrome-Moly steel and through hardened for maximum strength and toughness. Finished with corrosion resistant Melonite treatment. Measures 0.625” in length TA-3 is designed for use on barrels with 1/2-28 threads, commonly .223 REM (5.56x45) 100% designed and produced in the USA! Save this product for later Favorite