The Halcyon from AAC is everything you want from a rimfire silencer and nothing you dont. 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. Overbuilt for maximum performance and durability without the excess weight. Features indexed, shielded Titanium K-baffles. Modular design is 22 LR full-auto rated, 5.7 rated