STI Guardian: Slide not locking back with WC mags

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  • Medic218

    Active Member
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    0   0   0
    May 27, 2010
    729
    31
    Little Elm
    Hey guys, just wanted to see if anyone had any advice on what direction I needed to head in.
    As the title states the slide doesn't lock back, on empty, when I use Wilson Combat 7-rd mags in my STI Guardian, .45acp version. When I use the factory 6-rd mag everything works as it should.
    Something else I've noticed is that when inserting the WC mags there is a little resistance on the mag at about 3/4 of the way in. A hair bit more of a push and it seats just fine. The factory 6-rd goes in smooth.
    Both mags work great when firing, chambering and extracting.

    What I want is a 7-rd capability and for the slide to lock back on empty.
    Any ideas?
     
    Last edited:

    Andy

    Active Member
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    0   0   0
    Sep 13, 2013
    922
    21
    Dallas, TX
    Sounds like the mag follower - the shelf on the left-hand side (that makes contact with the slide-stop) has probably worn down a bit, being plastic.
     

    TexasRedneck

    1911 Nut
    Lifetime Member
    Rating - 100%
    9   0   0
    Jan 23, 2009
    13,917
    96
    New Braunfels, TX
    Sorry - but if you just go in and tweak the followers as needed, you don't need to buy anything else for 'em. I routinely run WWII-era mags on my 1911's with no issues.
     

    Dawico

    Uncoiled
    Lifetime Member
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    14   0   0
    Oct 15, 2009
    36,602
    96
    Lampasas, Texas
    Another issue to watch for is riding the slide stop while firing.
     

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