This 5.56 NATO Suppressor features reduced blowback-when compared to the previous model. The Turbo(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 Turbo(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 Turbo(R) K-RB is built with the same care, quality, and attention to detail that has defined the YHM(R) brand for generations. The Turbo(R) K-RB ships with the 1/2" x 28 Phantom(R) Q.D. adapter, (1) YHM-2007, (1) YHM-2146, and Q.D. flash hider or QD muzzle brake. SPECS 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 NTOA Member Tested and Recommeneded 2023