GrovTec US HUB Direct Thread Suppressor Adaptor 223 Remington/5.56 NATO 1/2X28 Nitride Finish Black. Whether you're a hunter an American service member or a shooting sports competitor they believe you deserve tools made by fellow Americans who share common ideals and pride in performance. Specifications for GrovTec US HUB Direct Thread Suppressor Adaptor: Manufacturer: GrovTec US Color: Black Finish: Nitride Black Additional Features: Adaptor Case Finish: Nitride Handle Color: Black Blade Finish: Nitride Features of GrovTec US HUB Direct Thread Suppressor Adaptor Low Profile Flush Mounting One-Piece Stainless Steel Construction Package Contents: GrovTec US HUB Direct Thread Suppressor Adaptor GrovTec US GTHM370: HUB Direct Thread Suppressor Adaptor 223 Remington/5.56 NATO 1/2X28 Nitride Finish Black