The Gemtech SAR-57 suppressor in 5.7×28 is designed specifically for use with the AR-57 upper receiver. Similar to its brethren – the Gemtech SFN-57 pistol silencer – the SAR-57 option is 5.8in long, allowing it to fit under the mounting interface, yet slightly protrude from the rail system; therefore, the suppressor may be easily removed from and installed onto the host firearm. Moreover, this durable and featherweight unit may also be run on .22Mag, .17HMR, and other smaller (jacketed) calibers. Its versatility is paramount.