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magazine usp

  1. HK HANDGUN TALK
    Is there a reasonable way to convert the USP 10 round magazines to 15 round? I figure the springs will obviously have to be replaced. I just bought a used USP 9mm off a guy and he had one 15, and 3 10 round. I did look on the forum but didnt see anything about this. I have most tools in my...
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