GG&G Slim Line HK USP Adapter for Surefire X200 & Streamlight M3/M6
Flashlights for full size USP. | HKPRO Forums
Finally picked up a GG&G adapter for my USP9SD : r/HecklerKoch
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
USP 45 w/GG&G rail adapter and X300U : r/HecklerKoch
GGG Pistol Flashlight Adapter - USP Full Size - HKPARTS
HK Flashlight Mounts
PROMAG RAIL ADAPTER HK USP M3 M6
USP9C with GG&G rail and TLR-7A : r/USPmasterrace
Amazon.com : GG&G Hu USP Comp Slim Line M3/M6 Mount Gun Stock Accessories : Sports & Outdoors
GG&G GGG-1133SP Pistol Adapter for HK USP Full Size - Light / Laser Mount - NEW 813157007194 | eBay
Amazon.com : GG&G Hu USP Comp Slim Line M3/M6 Mount Gun Stock Accessories : Sports & Outdoors
GG&G HK USP Compact Light/Laser Mount Aluminum Matte Black | Cheaper Than Dirt