The PipSqueak 22 is like MINI MIDGET MAGIC on your rimfire rifle or pistol! It makes your 22 whisper-quiet at an insanely light 1.5 ounces. Hint: Try your PipSqueak 22 with your lightest 22 - But put a rock on it so it doesn't float off! At just 1.5 ounces and 3.5 X 1.1 in diameter, the PipSqueak 22 is simply the funnest 22 cal suppressor ever made! This 'kid-brother' is the shortened version of the incredible AnechoX22 It has a fixed 1/2X28 thread, making it compatible with almost every threaded rimfire on the market. It's full-auto rated to 100 rounds 22 LR and rapid-fire rated to 25 rounds 22 Mag. ATTENTION: NOT rated for any .223/5.56. Round count must be reduced for shorter barrels. DO NOT exceed 400deg F. Maximum bullet diameter for the PipSqueak22 is .224. Brilliantly engineered in Aerospace 7075 T6 Aluminum and Grade 5 Titanium for insanely high strength-to-weight ratios. Titanium is brilliantly used in the thread insert to prevent thread galling and carbon lock. Cerakoted front Cap Threads keep the disassemble end running smooth.