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The only real choice - GG&G HK USP Slim Line M3/M6 Mount
by
GB,
Verified Owner
from TX, United States
Written on May 24, 2025
The only real choice to convert your HK USP proprietary rail to Picatinny. There is another product out there, but this one appears sturdier. No issues attaching this piece to the USP, and no issues attaching various TLRs to it. I recommend this one without reservations.
Would Recommend:
Yes
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