The Osprey 45 is uniquely designed in a polygonal shape to allow for greater internal volume and better overall sound suppression. Due to the shape, the Osprey also sits below the shooter's line of sight, thereby not impeding standard pistol sights. The updated version added a push-button locking system for quick and repeatable indexing. All of these features combined make it one of the sleekest and most iconic pistol suppressors on the market. Rated for 9mm to .45ACP, and for .300 BLK subsonic calibers. Compatible with pistons and fixed barrel spacers for attachment to a host firearm. Best .45ACP suppressor box suppressor square suppressor below sights suppressor