HELP G48 SHIELD MAGS PROBLEM

Discussion in 'Glock Forum' started by Andyman85, Jul 7, 2020.

  1. Andyman85

    Andyman85 Active Member

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    I ran the two mags through the G48 and had an failure on the second mag. Only this time it jammed on the firing pin, lol. At this point I have over 800 rounds through this gun only on this issue. I have somebody else compare the two slide releases, and they said they look the same. With the scarcity of 9mm and the high price, I think at this point I can either:
    A. Wait and see if shield arms will ever respond.
    B. Stop wasting more range time and ammo and buy a new mag release. and do a final test.
     

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  2. rbbeers

    rbbeers Well-Known Member Lifetime Supporting Member

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    At this point in the slide cycle, the protruding firing pin (red arrow in the picture below) means that the trigger bar did not reset properly and the cruciform sear did not engage the firing pin lug as the slide started moving forward at the beginning of the return phase of the slide cycle.

    Protruding firing pin 1a.jpg

    Possible causes are the...
    • trigger connector mounting angle is incorrect
    • trigger bar cruciform is binding in the trigger mechanism housing
    • trigger bar is binding on the frame (magazine?)
    • trigger spring assembly in the trigger mechanism housing is defective/binding
    ... and probably some other 'things' that don't immediately come to mind.

    Given the picture above, I can assure you that something is indeed different about the G48 frame (fitted with the 'problem' parts).

    Best regards,

    Bob
     
    Last edited: Jul 9, 2020
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  3. Andyman85

    Andyman85 Active Member

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    Thank you, I will take it to a gun smith and have him look it over
     
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  4. j102

    j102 Well-Known Member

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    Your G48 was running fine before installing the Shield Arms mag catch, right? And started having issues after. So it sounds like a mag catch issue and follows what they mention on their website.
     
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  5. rbbeers

    rbbeers Well-Known Member Lifetime Supporting Member

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    Be that as it may...

    Their presentation is simply a generic description of the function of a magazine catch and what happens when a metal catch wears the slot on a polymer magazine body.

    To cause the problem described in his original post, a defective magazine catch would have to cause the magazine to seat about 0.070" low in the magazine well.

    If, in fact, that's the case... that is, the magazine does indeed seat that low... then, yes, I agree... the catch is defective and needs to be replaced.

    Otherwise, I'd look elsewhere.

    All that said, a defective magazine catch certainly wouldn't explain the protruding firing pin... the sear simply failed to engage the firing pin lug. And, at this point, I don't understand how a defective magazine catch could cause that.

    Best regards,

    Bob
     
    Last edited: Jul 9, 2020
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  6. John in AR

    John in AR Well-Known Member Supporter

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    Kind of left-field thought, but is is possible that the RSA's got swapped between the guns? I don't have a 48 or 43X either one and don't know if it's even possible to swap them, but something to consider.
     
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  7. rbbeers

    rbbeers Well-Known Member Lifetime Supporting Member

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    The G43X and G48 use the same RSA... Glock Part No. 33379.

    Best regards,

    Bob
     
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  8. mtelep

    mtelep Junior Member Supporter

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    They are the same frame! The mag releases are the same in the 43, 48, and the 43x.
     
  9. rbbeers

    rbbeers Well-Known Member Lifetime Supporting Member

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    That's true... but the longer slide may have caused some confusion.

    Without a bit of research, one may not realize that the RSA seat on the G43X and G48 slides are the same distance from the RSA seat on the frame due to the 'extended' seat on the longer G48 slide (similar to that of the G34).

    Best regards,

    Bob
     
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  10. j102

    j102 Well-Known Member

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    He swapped complete slides between the two guns, and only had issues with the G48 frame, no matter what slide was on it.
     
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  11. Andyman85

    Andyman85 Active Member

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    So Shield Arms did respond back and apparently there is an issue withe Gen 1(Stainless steel slides). They have been reports of the G48 stainless slides not having enough spring tension. So they have an upgraded spring to buy.
    https://shieldarms.com/5-pack-s15-magazine-10-power-spring
     
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  12. rbbeers

    rbbeers Well-Known Member Lifetime Supporting Member

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    Hopefully, the stiffer magazine spring will correct the 'outrunning' issue. :)

    Please let us know.

    Best regards,

    Bob
     
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  13. Southlake

    Southlake Island Life Staff Member Moderator Lifetime Supporting Member

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    Stiffer is better.
     
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  14. rbbeers

    rbbeers Well-Known Member Lifetime Supporting Member

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    Recommended for early gen 1 Glock 43X and Glock 48 owners
    https://shieldarms.com/5-pack-s15-magazine-10-power-spring

    The following video illustrates the issue to which Shield Arms refers.

    At 11:54, the shooter replaces the stock magazine springs with the +10% power springs to correct the failure-to-feed problem.

    Shield Arms S15 Magazine - G43X/48! Are they Reliable?


    Enjoy! :)

    Best regards,

    Bob
     
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  15. Hollow-Point

    Hollow-Point Active Member Supporter

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    If it’s a known issue they should give them to you instead of an upgrade to buy
     
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  16. mtelep

    mtelep Junior Member Supporter

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    I would definitely think so!!!!! Are you going to replace all the springs??
     
  17. Andyman85

    Andyman85 Active Member

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    I already ordered $45 bucks works of springs, I kinda wish I didn't do this upgrade. Between the ammo in testing and mags. I don't wanna wanna think about how much I spent on this set up.
     
  18. Danzig

    Danzig I do hood rat sh%t! Supporter

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    When you run into 12 bad guys you’ll not regret the money spent.;)
     
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  19. Southlake

    Southlake Island Life Staff Member Moderator Lifetime Supporting Member

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    Well, you might regret turning left when you should have turned right.
     
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  20. Andyman85

    Andyman85 Active Member

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    So the upgraded mag springs came in and I installed them on all of my magazines. I shot 330 rounds through my G43X not a problem. I shot 405 rounds through my G48 as well with the upgraded springs and everything worked flawlessly. So the take away from this is if you have a silver gen 1 slide in the G43x or g48, you will need to buy the upgraded power magazine spring.
     
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