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Thread: Something Hits my cheek every once in a while

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  1. #1
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    Something Hits my cheek every once in a while

    My girlfriend had a spare BCM upper that she decided she'd probably never use, so I bought it from her.

    It's a carbine length upper with the BCM gunfighter compensator https://www.bravocompanyusa.com/BCMG...-mod-0-556.htm installed.

    The upper has functioned 100% with two BCM lowers I tried it out on, but every once in a while I will feel a momentary "sting" on my left cheek. I have never experienced this with any other AR or upper in my entire life. It usually only happens one time during an entire range session of 100 rounds or more. It usually happens early in the range session. I looked at the compensator and I don't see any evidence of bullet strike. I also don't get the compensator oily so that it might spray a red hot droplet of lube back at me. I wear prescription safety goggles when I shoot so I'm not worried about losing an eye. It's just one of those "what's causing this?" issues.

    What is the likelihood that the Gunfighter compensator is "spitting" material back at me?

    Could it be that or is it more likely something else?
    Last edited by Doc Safari; 10-16-17 at 16:14.

  2. #2
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    Are you shooting steel targets?

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    Quote Originally Posted by 5.56 Bonded SP View Post
    Are you shooting steel targets?
    No, in fact I'm shooting aluminum cans, water bottles, and whatnot, and I'm usually at least 50 yards away.

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    what kind of ammo are you using?
    On the seventh day God rested; Marines filled sandbags

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    Quote Originally Posted by ginzomatic View Post
    what kind of ammo are you using?
    PMC, Armscor, Federal. No reloads, just factory. I've used all of those with other uppers and I've never gotten that "sting" on my left cheek. Just trying to narrow down if changing compensators might make it go away, or if there is some debris leaking from somewhere else.

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    Quote Originally Posted by Doc Glockster View Post
    PMC, Armscor, Federal. No reloads, just factory. I've used all of those with other uppers and I've never gotten that "sting" on my left cheek. Just trying to narrow down if changing compensators might make it go away, or if there is some debris leaking from somewhere else.
    stab in the dark here, but have you taken a good look down the bore? could be shaving lead...
    On the seventh day God rested; Marines filled sandbags

  7. #7
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    Does it have a Gas Buster CH? IIRC, those are specifically called out as Do Not Use for southpaws... I'm assuming you're a lefty since that's the cheek being hit.
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    Standard charging handle. I don't see anything odd about the bore. As stated earlier: no evidence of bullet strike in the compensator. I actually shoot right-handed.

    The funny thing is: whatever is hitting my left cheek more or less strikes the exact spot every time.

  9. #9
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    I was going to say unburned powder when I thought you were a lefty. Try a CH from a different gun. I like the video tape idea. You'll have to share your results!


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    "Real men have always needed to know what time it is so they are at the airfield on time, pumping rounds into savages at the right time, etc. Being able to see such in the dark while light weights were comfy in bed without using a light required luminous material." -Originally Posted by ramairthree

  10. #10
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    I don't really agree with the shoot it till you figure it out mentality, no offense.

    Only time I had a gun blow shit into my face was an AK with fuqed up headspace.. It was piercing primers and such..
    I was lucky it didn't literally blow my face off.

    I vote take it to a gunsmith, or better yet send it back to BCM on their dime. Something is wrong, and if it was my gun I wouldn't shoot it anymore till the problem is properly resolved.

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