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GG&G HK USP Flashlight Picatinny Adapter Aluminum Matte
GG&G HK USP Compact Light/Laser Mount Aluminum Matte Black | Cheaper Than Dirt
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HK USP Rail Adapter - Full Size - Ultra Slim Line
H&K USP Compact Tactical
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What rail adapter is this for USP? | HKPRO Forums
GG&G Slim Line HK USP Adapter for Surefire X200 & Streamlight M3/M6
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H&K USP Compact Tactical - An HK USP 45 CT with barrel thread protecter, GG&G rail adapter with a 2nd Generation Viridian X5L green laser sight and tactical light. | Facebook
ArmaLaser GTO RED Laser Sight w/ GG&G Rail Adapter for H&K USP Compact Pistols | eBay
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SOLD* HK USP 9 Compact & HK USP 45 Compact | Louisiana Gun Classifieds & Discussions - Bayou Shooter