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Thread: S&W MP15-OR

  1. #21
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    Quote Originally Posted by dmcmanus View Post
    Oh come on! Some guy with less then 10 posts posts this, and your going to change your mind? If you can find a OR for 799 take it. I absolutely love mine! And like people above me have said you put bad reloads into any AR and your going to have a problem in any gun, even a Noveske.
    Was there something wrong with my post?Yes I have found one at a gun shop 4 miles from my house.I would rather have a BCM from Grant,but I can't find a dealer willing to help me.

  2. #22
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    Quote Originally Posted by jmp45 View Post
    Wow, I have an M&P15OR also, it's at S&W getting the gas block aligned. I couldn't zero windage without going about 10 clicks to right. It's been sitting in the shipping room for 1 week now. I've been calling and can't get them to throw it on a truck and give me tracking. So now I'm wondering.. are they intentionally holding because there are issues with these? I've got about 500 rounds of Remington UMC and the posts linked below says it's not so reliable.. not sure if they mean umc though.

    So these M&P's can't be trusted to be safe?

    http://tinyurl.com/n7d4y7

    http://tinyurl.com/nn3gtl
    One thing I noticed about my zero with the MP15: With PMC Bronze and Prvi 69 gr OTMs the zero at one hundred yards is almost at the same place. Maybe about an inch difference. Using this zero, then switching the ammo to Remington UMC green box, the POI is over 4 inches to the right.

    I repeated this test with my DDM4 and I didn't have such a large variation. The POI was maybe an inch to the right. Just something I noticed with the different ammo on the different gun.

  3. #23
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    Quote Originally Posted by huntwithfoxx View Post
    Was there something wrong with my post?Yes I have found one at a gun shop 4 miles from my house.I would rather have a BCM from Grant,but I can't find a dealer willing to help me.
    Yea if you have ever heard the term "confounding variable" the story of this particular gun fits the definition to the tee. you can buy what you want, but anyone that uses this one story as justification against a company is being rash and reactionary.

    Buy what you want I don't care.

  4. #24
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    Quote Originally Posted by cynergyou View Post
    ...I suspect the gun has a problem with the 5.56 ammo, which is slightly longer than the commercial .223 Rem ammo I was using.
    I'm not saying your S&W is not having issues with yours, but my M&P-15A feeds .223 Remington and 5.56mm ammo reliably (and interchangeably). I don't know if it would matter in this case, but I do keep the bolt carrier group wet.
    Last edited by ThirdWatcher; 09-10-09 at 03:36. Reason: grammer

  5. #25
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    Quote Originally Posted by uwe1 View Post
    One thing I noticed about my zero with the MP15: With PMC Bronze and Prvi 69 gr OTMs the zero at one hundred yards is almost at the same place. Maybe about an inch difference. Using this zero, then switching the ammo to Remington UMC green box, the POI is over 4 inches to the right.

    I repeated this test with my DDM4 and I didn't have such a large variation. The POI was maybe an inch to the right. Just something I noticed with the different ammo on the different gun.
    The ammo might be part of the zero thing. I used a steel rule and aligned on the edge of top rail and extended to the edge of gas block. The gas block appeared to be out of alignment by about 1/32" or so. S&W has it now in their shipping room. I've been trying to get them to throw it on a truck since middle last week. They are busy.

  6. #26
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    Quote Originally Posted by ThirdWatcher View Post
    I'm not saying your S&W is not having issues with yours, but my M&P-15A feeds .223 Remington and 5.56mm ammo reliably (and interchangeably). I don't know if it would matter in this case, but I do keep the bolt carrier group wet.
    Hi ThirdWatcher - When I took my gun to the range, I always made sure the bolt and bolt carrier group was very lubed (dripping with lube), and the chamber clean and free of carbon and debris. Unfortunately, I still had problems manually extracting live 5.56 cartridges. Hopefully S&W will be able to diagnose and correct the issue.

  7. #27
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    Quote Originally Posted by cynergyou View Post
    Hi ThirdWatcher - When I took my gun to the range, I always made sure the bolt and bolt carrier group was very lubed (dripping with lube), and the chamber clean and free of carbon and debris. Unfortunately, I still had problems manually extracting live 5.56 cartridges. Hopefully S&W will be able to diagnose and correct the issue.
    It should still be able to easily extract any round regardless of how nasty looking and filthy the chamber is. My chamber on one of my carbines has got all sorts of crud in it and it's good to go.

    The only thing I might have tried before shipping it off to S&W is adding the BCM extractor upgrade kit (minus the black rubber o-ring, as it doesn't likely need it) and see if that fixed the problem. I wouldn't have put any more effort into it than that though, since it's a new rifle and everything. You were right to ship it off to S&W though, hopefully they will resolve the issue for good.

    BTW I would go ahead and buy the BCM extractor upgrade kit anyways after you get your M&P15 back from S&W, as it's always great to have that added reliability.

  8. #28
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    Thanks for the tip RetreatHell. I will look into the BCM upgrade kit.

    Do you think I should test my S&W M&P15a without the black rubber O-ring in place on the extractor? My Colt 6920 does not have the rubber O-ring and it extracts fine (manually and when firing).

  9. #29
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    Quote Originally Posted by cynergyou View Post
    Thanks for the tip RetreatHell. I will look into the BCM upgrade kit.

    Do you think I should test my S&W M&P15a without the black rubber O-ring in place on the extractor? My Colt 6920 does not have the rubber O-ring and it extracts fine (manually and when firing).
    Well, I was only referring to the BCM extractor upgrade when I said not to include the black rubber o-ring around the extractor spring, because it probably wouldn't need it. But if it was having a difficulty extracting, or you felt that the extraction was a little "weak," after installing the BCM upgrade kit, then I'd go ahead and use the black rubber o-ring.

    However, if the bolt that came with your S&W M&P15 has an o-ring around the extractor spring, I would just leave it there since it came that way from S&W.

    My reasoning for that is simply because when I asked a similar question to a much more experienced shooter on this forum about an internal part of my KAC rifle, he told me to just leave it the way it came because Knight's Armament included it, so that probably means I should just not mess with it.

    So I'm basically just passing that same info on to you now. But I don't think it would be that big a deal if you just wanted to see how it performed without the o-ring in place, as you can always put it back on there easily.

  10. #30
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    Thanks RetreatHell. If I get a chance to go to the range this week, I'll try it without the O-ring.

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