AAC Halcyon, .22LR, 5.7mm, 1/2x28

THE JOY OF SHOOTING. RADICALLY REDESIGNED.The new Halcyon from AAC is everything you want from a rimfire silencer and nothing you don't. Go from long to short configurations in seconds, and easily disassemble without any tools required.No smoke, no mirrors, no unfounded claims - best in class, period.CALIBER17 HMR, 22 Long Rifle, 22 Win Mag, 5.7x28mmWEIGHT6.4 ounces Full, 4.5 ounces CompactLENGTH5.8" Full, 3.41" CompactDIAMETER1.0"FINISHBlack PVDMATERIALS17-4PH T6, TitaniumREDUCTION42dB*S.P.L114dB**Walther P-22, Remington Standard Velocity