The KAC MOD.MK23/USP .45 ACP silencer is the historical “mother” silencer to which all modern centerfire pistol silencers owe their lineage. The development and refinement of the inertial decoupling piston system (also known as recoil booster, Neilson device, and linear inertial decoupler (LID), etc), by Qual-A-Tec in the 1980s set the groundwork for future innovation. Doug Olson’s career journey from Qual-A-Tec to Knights Armament Company brought not only pistol silencer recoil system innovation that made its way into the pivotal SOCOM MK23 Offensive Handgun program, but also highly efficient and deceptively geometrically complex crimped-cone baffle technology that permeated through most KAC silencer models over the last three decades.

The B&T Impulse line of silencers and specifically the Impulse-IIA SD Mk23 evaluated in this study, also owe lineage to KAC designs and further demonstrate the wide proliferation of these advancements, worldwide. The KAC and B&T silencers evaluated in this program remain the only two silencers officially accepted by Heckler and Koch for use on the MK23 and USP45 Tactical combat handguns. The research and development of centerfire pistol silencer inertial decoupling recoil mechanisms, and purposeful engineering to ensure system reliability and longevity, is a dying art. It is our hope that this research presentation helps to reignite that practice area and bring discussion of these small arm weapon system performance parameters back into public interest and scrutiny.