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Swapping uppers and lowers

Discussion in 'Gunsmithing' started by Ktmexperiment, Feb 27, 2010.

  1. OK, I'm sure this has been asked before, and YES, I tried searching, but not much luck on my specific question.

    Tonight, at work, I swapped a gen 2 and 3 upper and lower on 2 guns. One thing that's already baffled me, is gen 2 guns are supposed to only have 2 pins, but mine had 3, so the swap with the trigger set worked too.
    So, I wanted a gen 3 frame for the grooves and rail, but I wanted to keep my trigger set (modified trigger, and lighter connecter), and I didn't feel like fooling with swapping sights, so we swapped uppers too.
    Anyways.................everything lined up.
    Will this work? It cycles just fine, and everything seems to work. I can only tell a subtle difference..........the front block, and the extractor.

    Need some quick answers cause I'll be shooting an IDPA match this weekend.
  2. faawrenchbndr

    faawrenchbndr DirtyThirty fan CLM

    Nov 24, 2005
    What model are you talking about?
    A 2nd Gen Glock has TWO pins, the trigger pin & the trigger housing pin.
    I would guess that your "2nd Gen with three pins" is a Gen 2.5 Glock.

    Operation will be fine, but I would not want mismatched serial numbers.:whistling:

  3. Yeah, i guess mine was an oddball in definitely had 3 pins.

    Shot it today, and seemed to do fine. The only weird thing is that I was shooting reloaded ammo. Jammed every other shot on the first stage of competition, but after that it did fine the rest of the day. I dunno if it was getting "seated" in or what the deal was.