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M&P 15 jamming?

Discussion in 'Black Rifle Forum' started by dale mcminnis, Dec 28, 2010.


  1. dale mcminnis

    dale mcminnis
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    Hey guys I'm having a problem with my M&P15.The last couple of time I've shot my M&P15 every few shots either the bolt does'nt pick up a round out of the magazine,or the bolt won't close,and the round,and bolt sticks as the round is going into the chamber.I asked a guy at work who has quite a bit more expirence with AR's said the chamber is dirty sence then I've bought a chamber brush.On a side note I have been shoting some pretty cheap,and probably dirty ammo(I'm on a limited budget,also the magazines are Brownells)So the question is if the chamber is dirty the last time I shot,and it did this I used the chamber brush how do you get enough movement on the chamber brush to clean the chamber?Any,and all help would be very much apprieciated.P.S.I got a new Millet DMS-1 for Christmas seems to be a great scope foe the money.Thanks Dale.
     

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  2. pennlineman

    pennlineman
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    Four things come to mind. Clean the chamber by rotating/twisting the chamber brush in the chamber. Try different magazines and make sure the firing pin retaining pin is not installed backwards. It goes in left to right as the bolt is facing away from you. Make sure you lube the bolt.
     

    #2 pennlineman, Dec 28, 2010
    Last edited: Dec 28, 2010
  3. Chuche2

    Chuche2
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    Lube it good. They run well wet. The last few years at Camp Perry a lot of the competitors wre using Mobil 1 synthetic motor oil on their rifles.
     
  4. dale mcminnis

    dale mcminnis
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    This may be a wus question,but how do you rotate the chamber brush:dunno:?I can't get good enough grip on the cleaning rod.Thanks Dale.
     
  5. pennlineman

    pennlineman
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    I have an old section of rod with fix T on it. If you have an old section of cleaning rod why not try hooking a set of vice grips to it. Cleaning the chamber should not require a lot of force, go easy.
     
  6. dale mcminnis

    dale mcminnis
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    I think I am running it pretty wet.I will increase the lube.Thanks Dale.
     
  7. glock22357

    glock22357
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    Sounds like it's time for a thorough cleaning. You should disassemble your BCG and clean it, clean the bore, chamber, locking lug area, inside your upper & lower. Then lube with some synthetic motor oil.

    Also, grab a PMag or three, and see if that helps.

    How many rounds since you last did a complete cleaning? What kind of ammo?
     
  8. dale mcminnis

    dale mcminnis
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    Thanks I'll impovize.Dale.
     
  9. dale mcminnis

    dale mcminnis
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    I clean the gun after every range visit all the way down to taking the bolt apart cleaning,and lubing,but I shot about 600 rounds thru it without cleaning the chamber properly I'm new to AR's and I just did'nt think about it.:dunno:
     
  10. glock22357

    glock22357
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    Got Ammo???

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    I'd be interested to hear if cleaning the chamber fixes things for you. The only thing I use for the chamber/bore is a bore snake, and I have never noticed the chamber on my rifle being that dirty.
     
  11. fuzzy03cls

    fuzzy03cls
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    It's not a problem with cleaning. AR's do not need to be cleaned all that much. A dirty chamber is fine for a while & should function just fine. It's either, lack of lube, mags or ammo.
    What ammo are you using?
     
  12. dale mcminnis

    dale mcminnis
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    Rite now silverbear:faint:.
     
  13. dale mcminnis

    dale mcminnis
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    Thanks for the great ideas guys still accept any more ya'll have.I'm cleaning it as we speek.Do ya'll lube bolt carier bolt everything?I will be using Triflow with teflon.Thanks Dale.
     
  14. glock22357

    glock22357
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    Got Ammo???

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    You should give some high-quality Synthetic oil a try. A major benefit is that due to the additives in them, cleaning is beyond a breeze. Oils like that are all about stopping carbon deposits, and lubricate like nothing else I've used.

    I myself do lube up my BCG inside and out while assembling, lightly.
     
  15. faawrenchbndr

    faawrenchbndr
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    Dale'

    Take a piece of cleaning rod, placed it in a vice.
    Leave about 2 inches above the vice.
    Heated with a torch, if you have one available, if not use a hammer.
    Bend it to a 90 degree angle, this will gave a cheap handle.
     
  16. dale mcminnis

    dale mcminnis
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    Thankyou sounds like a great idea.
     
  17. MrMurphy

    MrMurphy
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    Lube. Lots. Carbines, like women, run better wet.

    Better ammo, good magazines. Brownells has the USGI contact at the moment so they're not bad, but try others (MagPul PMags, which are also issued now) because that particular mag may be bad.
     
  18. cowboy1964

    cowboy1964
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    Don't over lube it for crying out loud. Save "dripping wet" for other endeavors :)
     
  19. NeverMore1701

    NeverMore1701
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    It's damn near impossible to overlube an AR. It is very easy to underlube it.
     
  20. Gunnut 45/454

    Gunnut 45/454
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    I agree with whats been said so far. I would suggest not using teflon as a lube. It tends to buildup over time making things tight! Silver Bear is poly coated ammo. Is a dirty burning ammo. Give it a good scrubiing including the chamber! Lube it up with a good lube like Mobil 1 I use 5w30 oil myself! Try it and see if your problem goes away! If not get a new/different mag! If you still have a problem -try different ammo! Seeing your gun is fairly new it should have M4 feed ramps so that should not be an issue!:supergrin:
     
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