AR pistol 7.5" problem.

Discussion in 'Maintenance & Gunsmithing' started by biggie24420, Jul 14, 2017.

  1. gryghin

    gryghin
    Beaverton
    Gold Supporter Gold Supporter

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    Have you verified that the pistol upper is not suspect by using it on a different pistol lower, with all the associated BCGs and buffers that exhibited the problem on the Aero lower?

    If you don't have one available, I'd be willing to meet up at Wolf Creek Road, so that a proper test could be done.
     
  2. Reco

    Reco
    Portland Oregon
    Active Member

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  3. 308

    308
    ΜOΛΩΝ ΛΑΒΕ
    ΜOΛΩΝ ΛΑΒΕ Silver Supporter

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    If it is short stroking, he can open the gas port a bit. I did that with my shorty FAL several years ago and it ran perfect afterwards.
     
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  4. biggie24420

    biggie24420
    Beaverton Oregon
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    No I haven't done that. The only other lower I have is my M4 lower and that'd obviously be a no no. I appreciate the offer but I'm gonna wait till I install the new catch and go shoot it. I will PM you if I decide to take you up in that offer.
    Thank you!
     
    Last edited: Jul 16, 2017
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  5. biggie24420

    biggie24420
    Beaverton Oregon
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    That was one of my earlier thoughts but shooting my M4 16" upper on that pistol lower, same issue with the BCG, wouldn't lock back. That threw me off a bit but I like the pistol so one way or another...... I'll get to the bottom of this.
     
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  6. Kruejl

    Kruejl
    Hillsboro
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    Try a lighter buffer spring.
     
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  7. biggie24420

    biggie24420
    Beaverton Oregon
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    The original carbine spring from the Stag M4 was used originally. That spring is the lightest out of the 4 springs I have. I've used the one out of my spikes M4, the Stag spring (one I just mentioned), and my new Wolff and Colt..... same result, no BCG lock back after last round.
     
  8. Garg

    Garg
    east of portland metro
    Hold my beer..... watch this Bronze Supporter

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    It's gotta be that dang fancy bolt catch. Replace that then check back in with us.
     
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  9. biggie24420

    biggie24420
    Beaverton Oregon
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    Ya my package from MidwayUSA will be here on the 25th and I plan on taking the GF shooting on her birthday next month so That's when I'll be testing the new catch lever.

    Unless I find a private property to go shoot a few rounds on, I'll have to wait a while. Every time I go to the range, it's $30 or so...... it's getting old lol. Ya I could go to the woods but my car doesn't like to go off road..
     
  10. Stomper

    Stomper
    SCREW YOU SALEM!!
    SCREW YOU SALEM! Gold Supporter

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    You need one of these babies!

    IMG_4403.GIF
     
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  11. Garg

    Garg
    east of portland metro
    Hold my beer..... watch this Bronze Supporter

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    Well, you are welcome to come out to my place, and test it here. We could tech that thing just right, test the bolt catch, change it out, test different uppers, lowers, what ever you want, and I wont charge you $30. I am on the other side of the world though lol....out towards Estacada...
     
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  12. Mygrainman

    Mygrainman
    SW WA
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    Does it have one of those "pig tail" gas tubes? I've heard of those causing short stroke issues.
     
  13. biggie24420

    biggie24420
    Beaverton Oregon
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    No it's a pistol length gas tube. It's even shorter than the M4 gas tube.....it's kinda cute and adorable lol. I wanna replace it with a melonite coated gas tube eventually.
     

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