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45 40 conversion threaded

  1. 45 USP Compact Conversion

    HK HANDGUN TALK
    I have been checking out various forums as to the possibility for converting my 45 USP Compact to 40 S&W. Mainly I am interested in the addition of a compact length threaded barrel in 40 S&W. Allot of threads are say that the frame is too big, period. others say it just a matter of changing...
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