Active Retention Hip Holster for Beretta M9/M92 Right Hand Measurements: Length 5 3/4" , Width 4 2/3" The Beretta M9/M92 holster will fit most any M9 or M92 without a railed frame. The active retention system has a spring loaded catch which locks onto your pistols trigger guard as you holster it. nce it locks in the pistol will not come out until you press the release no matter what you do. You can do a back flip off of a trampoline or hang upside down until you are red in the face, it will not come out until you press the release.