The Phantom(R) provides superior sound reduction on both pistols and rifles thanks to a newly designed baffle system. The rear of the blast chamber serves as the takedown tool for the muzzle cap, which means you will always have the disassembly tool when you need it. It features a shielded interlocking baffle stack made from heat treated 17-4 stainless steel, and each baffle has indexing tabs to ensure proper orientation for optimum performance. The outer assembly consists of 2 parts: the 7075-T6 aluminum blast chamber bears the serial number, and the 6061-T6 tube houses the baffle stack. The blast chamber features a stainless steel 1/2"-28 thread insert to prolong the life of the mounting threads. A stylish aluminum muzzle cap holds everything together. Thanks to the combination of lightweight aluminum and strong stainless steel, the Phantom(R) .22 is able to handle rounds up to 5.7x28mm while weighing a mere 4 ounces. SPECS Caliber: .22 Weight: 4 oz. Length: 5.5" Diameter: 1.1" Construction: Aircraft quality aluminum & 17-4 PH SSMount: 1/2"-28 Direct Thread Mount: 1/2" x 28 Phantom Q.D. HUB adapter Decibel Rating: 115 dB Minimum Barrel Lengths: .22 LR: No restrictions .22 MAG: 10" 5.7 x 28: 10" .17 HMR: 10" Full Auto Rated