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Vortex Viper / Venom Red Dot Sight Mount for HK VP9 OR | VP9L Optics Ready (fits Burris FastFire and Docter)
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Ade Advanced Optics RD3-015 Waterproof RED Dot Reflex Sight Pistol + Optic mounting plate for HK USP Tactical 9mm 45ACP 40 SW - OPTICSFACTORY
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Amazon.com : Ade Advanced Optics HK USP Tactical Mini Dotx Sight Pistol Mount Base : Sports & Outdoors
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Finally upgraded my USP Compact with the LEM conversion, Trijicon RMR, and a tungsten cerakote! Only problem is I haven't been able to find suppressor height sights for the USP that haven't
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