The SureFire RYDER 22-S is a direct-thread option suppressor with aluminum tube and stainless baffles. Simply thread the suppressor to any .22LR, .22WMR, and .17HMR handgun or long gun with 1/2-28 threaded muzzle. This suppressor comes with a disassembly tool, alignment spud, and spacer to be used as needed. Caliber: .22LR, .22WMR, .17HMR Weight: 5.2oz (147.4g) Diameter: 1.00" (2.5cm) Length: 5.4" (13.7cm) Construction: Aluminum and Stainless Steel Patented body design with rounded edges and fluting to reducing weight with no sacrifice in strength. Numbered and indexed baffles for ease of assembly with built in Mfg: Surefire