The GEMTECH 22 QDA is a universal quick-detach adapter designed to streamline the use of your rimfire suppressors. This system allows for the fastest, most efficient attachment and detachment of your silencer, letting you switch firearms quickly while maintaining control.The system uses a two-part design:Muzzle Device: A four-lug device threaded 1/2"-28 for maximum compatibility with all standard rimfire barrels.QDA Mount: This mount is also threaded 1/2"-28 for use with nearly all rimfire silencers chambered in 22LR and 22MAG.