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barrel threads

  1. MP Gunsmithing
    In looking at a few(4) ported 9L CS barrels I noticed punch marks on the lower lug flat. Some had 1 punch, one had 2 punches, one none. Any ideas what the punches tell us??
  2. MP Talk
    Would it be possible to re-thread a barrel from metric 16x1 LH barrel to .578 RH? I'm waiting on my stamp for an osprey 45 for my M&P 45 host with .578x28 RH threads. I am interested in buying an HK45 as a second host but the only factory threaded barrels are16x1 LH. I really didn't want to mess...
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