YHM's .R45 suppressor is our most versatile suppressor system to date. It was created to provide the shooting enthusiast a quiet lightweight and cost effective suppressor. This one suppressor can be used on a variety of calibers such as .45 ACP 9mm Luger 5.56mm NATO .300 Blackout .308 Winchester and even .45-70! The notched rim and tri-port muzzle on the end cap make it stand out among the crowd. Like the R9 the R45