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Thread: BCM Prototype upper?

  1. #231
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    Quote Originally Posted by alx01 View Post
    Bought one out of curiosity just to see for myself after waiting for two years to get it released. Some original skepticism and concerns aside...

    Initial impressions - absolutely great! Perfect machining, finish, anodizing, and dry lube inside.
    Overall design, in my opinion is a step or two ahead of a mil-spec upper. For some reason it feels lot more streamlined and compact around a brass deflector and a forward assist.

    Haven't assembled it into the complete yet, but barrel extension seems to be ultra tight - much, much, tighter than a standard BCM upper and definitely will require some heat to install.

    Area around the port cover door is very thick, so is the area just below a barrel nut threads. Geissele rails with lower anti-rotation tabs (MK13/14) won't fit out of the box and will require tabs to be filled off approximately 1.5-2mm on each side. Rails like Centurion might or might not fit, as the area just above barrel nut (and below the area where BCM MCMR anti-rotational tabs install) also appear slightly thicker than a mil-spec. For the reference see post #129 for BCM rail tabs location: https://www.m4carbine.net/showthread...41#post2783841

    If you're not planning to move a handguard around it's probably worthwhile to file tabs to size.

    Fit to lower (again try fit for testing) - feels to have less slop than a regular BCM upper (good improvement), but not medium-tight like some Aero uppers. No concerns regarding a fit.

    It feels like a solid product. No concerns with aesthetics. After some initial concerns about a rail fitment, I think it's a winning product and see no reason to buy other higher priced mil-spec uppers like a regular BCM, COLT, LMT, DD over this.
    Thank you for making a quality post to add in your thoughts and actually having product in hand. When I read your post, I grabbed a Centurion Arms rail and trying fitting it to the BCM improved upper. It is ALMOST close enough to tap it into place. I'm going to heat the rail and see if it will, but my guess is that it will take a couple swipes with a file. If I can find my calipers, I'll pull some measurements.
    Stick


    Board policy mandates I state that I shoot for BCM. I have also done work for 200 or so manufacturers within the firearm community. I am prior service, a full time LEO, firearm instructor, armorer, TL, martial arts instructor, and all around good guy.

    I also shoot and write for various publications. Let me know if you know cool secrets or have toys worthy of an article...


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  2. #232
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    When will these be shipping? Has BCM had them in stock? I noticed Brownells has them available for ďpre-orderĒ

    ETA: Clarifying that Iím asking about the upper alone not assembled uppers from BCM.

    BCM ainít got that good good RGP or Centurion CHF goodness
    Last edited by Eurodriver; Yesterday at 10:49.

  3. #233
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    Quote Originally Posted by Eurodriver View Post
    When will these be shipping? Has BCM had them in stock? I noticed Brownells has them available for “pre-order”

    ETA: Clarifying that I’m asking about the upper alone not assembled uppers from BCM.

    BCM ain’t got that good good RGP or Centurion CHF goodness
    BCM had a bunch for sale and they went quick. If I talk to Paul I'll find out when they are expected back in stock. I know that I want to order a few for builds. Which makes no sense as I'm already sitting on a bunch of uppers, but I feel that need for new cool toys!
    Stick


    Board policy mandates I state that I shoot for BCM. I have also done work for 200 or so manufacturers within the firearm community. I am prior service, a full time LEO, firearm instructor, armorer, TL, martial arts instructor, and all around good guy.

    I also shoot and write for various publications. Let me know if you know cool secrets or have toys worthy of an article...


    Flickr Tumblr Facebook Instagram RECOILMAGAZINE OFF GRID RECOIL WEB

  4. #234
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    It sure would suck if you told Paul people were asking for 16” Recce URGs with Mk2 uppers...

    Quote Originally Posted by Stickman View Post
    BCM had a bunch for sale and they went quick. If I talk to Paul I'll find out when they are expected back in stock. I know that I want to order a few for builds. Which makes no sense as I'm already sitting on a bunch of uppers, but I feel that need for new cool toys!
    Quote Originally Posted by scottryan View Post
    That isnít a factory Colt or FN rifle.
    - scottryan after being shown photos of a USGI Factory Colt Rifle

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