This 5.56 NATO suppressor sports new baffle geometry resulting in reduced blowback. Built with the same care, quality, and attention to detail that has defined the YHM(R) brand for generations, the Fat Cat(R) was created to provide a compact suppressor with great sound. The Fat Cat(R) is made from 17-4 stainless steel along with a Cobalt 6blast baffle. The combination of these materials allows the suppressor to be full auto-rated and designed for rigorous use. The overall length measures just 4.5" with the sRx(R) adapter installed. That's a full inch shorter than our Turbo K model with its included adapter. The Fat Cat's larger 1.94" diameter creates more internal volume resulting in a lower, more pleasant tone. With an average sound pressure level of 139dB at the muzzle, the Fat Cat(R) is quite the performer for its size. Available in either standard or Cat's Ass endcap. The Fat Cat(R) includes the sRx(R) 1/2" x 28 QD Adapter, Mini sRx(R) Muzzle Brake, (1) YHM-2007 and (1) YHM-2146. 5.56 NATO: 10" Minimum barrel length.