The SRD22X 22LR can be used on both pistols and rifles and features a Grade 9 Titanium outer tube with 17-4 stainless steel baffles. Due to the durability of its materials, the SRD22X can be used with .22LR pistols and rifles chambered in .17HMR/.17 Mach II and .22 Magnum. The SRD22X comes with a 1/2x 28tpi mount, with an available M9x.75 rear mount, and is fully user-serviceable.  WE ARE NOW DOING NFA ELECTRONIC FINGERPRINTING (EFT FILE) & PHOTOS AT THE STORE. WE ARE USING THE ATF'S NEW E-FILE SYSTEM. THIS MEANS YOU SHOULD SEE YOUR TAX STAMP BACK IN ROUGHLY 6-8 months OR LESS ACCORDING TO THE ATF. An appointment will need to be scheduled for this service.