The Osprey 2.0 was designed to be used wet or dry. Shooting wet temporarily improves sound suppression by inserting a small amount of ablative media. This can be done by inserting about 5ccs (or a typical water bottle cap full) of clean water or clear wire pulling gel into the back of the silencer. The Ospreys unique shape make it the only multi-caliber polygonal pistol silencer on the market. The monocore baffle design in a polygonal package allows for greater internal volume and therefore better sound performance. The Osprey utilizes a push button locking system for quick indexing. This system allows the majority of the suppressor to sit below the shooters line of sight, therby not impeding standard pistol sights. Brand SilencerCo Category Suppressors Series 2.0 Model Osprey 45 Caliber 9MM to 45 ACP and 300 BLK Color Black OAL 7.90" Material Aluminum / Stainless Steel NRR 130.4 dB Diameter 1.30"x1.75" Weight 9.20 oz