This 5.56 NATO Suppressor features reduced blowback-when compared to the previous model. The TurboA(R) K-RB utilizes a tubeless design made from heat treated 17-4 stainless steel along with a Cobalt 6 blast baffle. The combination of these materials allows the suppressor to be full auto rated and designed for rigorous use. The blast chamber of the TurboA(R) K-RB is threaded to the popular 1.375"-24 HUB thread which allows it to utilize many available mounting options. The notched rim and tri-port muzzle on the end cap make it stand out among the crowd.The TurboA(R) K-RB is built with the same care quality and attention to detail that has defined the YHMA(R) brand for generations.The TurboA(R) K-RB ships with the 1/2" x 28 PhantomA(R) Q.D. adapter (1) YHM-2007 (1) YHM-2146 and Q.D. flash hider. Caliber: .5.56mm Weight: 8.7 oz./11.5 oz.w/adapter Length: 4.6"/5.5" w/adapter Diameter: 1.5625" Construction: 17-4 Ph SS/Cobalt 6 Blast Baffle Mount: 1/2" x 28 Phantom Q.D. HUB adapter Decibel Rating: 138 dB Minimum Barrel Lengths: 5.56 NATO: 10" Minimum barrel length Full Auto Rated