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AR 15 not cycling

Discussion in 'Maintenance & Gunsmithing' started by Cherpybird, Oct 19, 2015.

  1. Cherpybird

    Cherpybird Portland Active Member

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    Hey guys,

    I recently installed a mid length gas tube on an AR and took it out today. This is the first time this rifle had been fired and it would not eject spent cases. I'm thinking the gas tube might need moving.

    I was shooting 55gr AE ammo out of a 16" barrel.

    What do you lot think?
     
  2. Unka-Boo

    Unka-Boo Milwaukie Active Member

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    You replaced a midlength with a midlength?

    ....your post reads to me like you "changed" it to a mid...which would require a new barrel....

    ....assuming you just swapped like parts, make sure the gas port is lined up with the block.....
     
    mjbskwim and Stomper like this.
  3. Cherpybird

    Cherpybird Portland Active Member

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    I replaced a carbine length with a mid length gas tube. Why would it require a new barrel?
     
  4. Cherpybird

    Cherpybird Portland Active Member

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    No need to reply, I just realized what I failed to remember the gas port.
     
    Medic! and Stomper like this.
  5. coctailer

    coctailer Portland, OR/Hastings, MI/Vancouver,WA I run with scissors.

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    Will the bolt even close on a carbine length system with a mid length tube installed?

    You need to put the carbine tube back on.

    It won't work with the longer tube.
     
  6. Cherpybird

    Cherpybird Portland Active Member

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    Yeah I realized that as I replied. The bolt does close, I simply moved the gas block forward. I suspect it wouldn't be correctly aligned though.
     
  7. Oathkeeper1775

    Oathkeeper1775 Coast Range VINCE AUT MORIRE Bronze Supporter

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    Good topic, thanks.
     
  8. Stomper

    Stomper Oceania Rising White Is The New Brown Silver Supporter

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    o_O







    :D
     
    titsonritz and Cherpybird like this.
  9. Cherpybird

    Cherpybird Portland Active Member

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    Yes I know.
     
    mjbskwim and Stomper like this.
  10. v0lcom13sn0w

    v0lcom13sn0w Keizer, or Well-Known Member

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    well crap... i guess since you already have a midlength gas tube you have to build a mid length AR now. throw a spikes t2 or h buffer and a GOOD muzzle brake in a mid length build and youll have a soft shootin AR my man.
     
    mjbskwim, SFGIANTSGUY28 and Dyjital like this.
  11. Cherpybird

    Cherpybird Portland Active Member

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    I think you're correct.
     
  12. v0lcom13sn0w

    v0lcom13sn0w Keizer, or Well-Known Member

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    i have a surefire procomp and a t2 buffer in my carbine length... gun feels like a 10/22 when i shoot it
     
  13. kod38

    kod38 Keizer, Or Member

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    X2 Surefire Procomp - $59 at Curt's money well spent, and it keeps people from standing next to you while shooting ;)
     
    v0lcom13sn0w likes this.
  14. SFGIANTSGUY28

    SFGIANTSGUY28 Beaverton, OR Active Member

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    I love this!^^^^^ Almost every time for me it starts with a spare trigger guard or pistol grip! :s0086: