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Thread: BCM vs Magpul SL stock?

  1. #31
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    Quote Originally Posted by RichFitz View Post
    As a policy we do not post anything but technical common knowledge in an open forum. So as detailed as I can get is the material type reacts differently to humidity as it relates to extreme temperatures.

    On the subject of strength. In the late 1990's the M4 Carbine issued by Colt came with a ribbed plastic stock that was made with very low grade materials and could be broken relativity easily. In the early 2000s the Vltor, Magpul CTR and SOPMOD stocks were released using modern polymers, impact modifiers and modern processing techniques. These stocks represented a real leap forward in usable strength and set the bar for future designs based upon the standard carbine tube.

    Since then over the last decade improvements continue to be made to the point that the CTR was in the middle of the pack of those drop tests in 2012 (see earlier post for link) and the STR was first. Now two year later, the MOE SL beats the STR, but in terms of how it affects the user it less important. We now have stocks so strong that we are elongating the holes in the buffer tube as we increase the load to ever more dramatic levels.

    In the end, we cannot forget that a stock's primary purpose is to provide a critical point of contact for the shooter, not to be a hammer (although if you need a hammer there is always the UBR).

    Few people today will ever break a modern stock in the normal course of use (even in combat and extreme conditions). That said, it is good to remember that the standard M4 ribbed stock, with all it's flaws has been on the shoulder of our servicemen in combat over the last decade and has successfully put down more bad guys that all the commercial stocks combined.
    I understand your policy and find those results interesting. I've always characterized wood as being susceptible to changes in humidity in a radical way, not polymer.

    It sounds like we're nearing a point of diminishing returns with regard to stock strength.

    What's the next evolution? Weight reduction? Incorporation of recoil reduction features for bigger calibers? More radical overhauls to the concept of the RE interface itself? Modularity? All of the above?

    I'm sure you won't be able to speak with any degree of specificity, but while I've got you on the phone I figured is give it a shot.

    Thanks again for taking the time.
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  2. #32
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    The first time I saw the BCM stock I was interested in what it could do. The more I see the reviews on the stock, the more I want to purchase one. I have seen the Magpul SL stock reviews, I am more impressed with the BCM stock. It is light weight and tough stock.
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  3. #33
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    I'm happy with my STR but have been following the SL and the BCM, I may eventually one or the other, but I want to see what other versions/mods BCM introduces first.

  4. #34
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    Hell, I have a BCM stock (black) if anyone wants to swap me and MOE SL stock. I'd be happy to do an even trade if you have the SL but want to try the BCM. I want to try the SL but have the BCM. For the cost of shipping, we could both be happy.

    My opinion on the BCM was kindof "meh", and it made my 16" carbines a bit front-heavy feeling. Just my .02. If you have an SBR, though, it may really be the ticket.

  5. #35
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    I respect how tough the BCM stock is, how light it is, etc. but I agree with several others in this thread.

    The main things that people are now using is aesthetics, balance, cheek-weld (ergonomics) specific to themselves, and price, to determine which stock to buy. They are almost all "tough enough".

    That is where the BCM dropped the ball for me. Balance, mainly, followed by a very distant "ease of use" (need to wedge something in that hole to allow installation) and aesthetics. Both arguably unimportant, but once I disliked the balance, I began ruminating on those items as well.

    For some, though, I think the BCM stock is going to rock. SBR owners, people who really like the looks, etc.
    Last edited by WS6; 11-18-14 at 03:55.

  6. #36
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    I recently put the new BCM stock on my new Colt carbine build. I actually like it. It's a very nice snug fit on the Vltor A5 tube, and sleek. Am I going to dump my other stocks for them? No probably not unless something breaks. I think the price point makes it competitive with similar stocks.



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  7. #37
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    Im hoping to get my tax stamp any day and this sbr has an A5, earlier in the thread magpul (rep?) said they made it longer for an A5 so my thought was maybe SL for this and BCM on the next, carbine, sbr.

    Does the BCM not completely close on your a5, and are there any potential issues with this?

    thanks

  8. #38
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    Can someone provide a the butt length, from heel to toe for the following stocks?

    1. BCM
    2. B5 Bravo
    3. Standard M4
    4. SOPMOD

    Thanks,
    Jason

  9. #39
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    Quote Originally Posted by BufordTJustice View Post
    I understand your policy and find those results interesting. I've always characterized wood as being susceptible to changes in humidity in a radical way, not polymer.

    It sounds like we're nearing a point of diminishing returns with regard to stock strength.

    What's the next evolution? Weight reduction? Incorporation of recoil reduction features for bigger calibers? More radical overhauls to the concept of the RE interface itself? Modularity? All of the above?

    I'm sure you won't be able to speak with any degree of specificity, but while I've got you on the phone I figured is give it a shot.

    Thanks again for taking the time.
    It is not that well known but some of the most utilized polymers such as Nylon derivatives are hygroscopic and can soak up water in their fibers. This is the reason that you can dye lighter colored plastic darker using common RIT dye (remember all those gray HK stocks that were dyed from primer gray to black back in the 90s?).

    A quick look at some old Shotgun News ads show much has happened to the AR15 1960's design in just the last 20 years. As such I will not hazard a guess on where the AR15 design will go next as it continues to surprise me.

  10. #40
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    Quote Originally Posted by RichFitz View Post
    It is not that well known but some of the most utilized polymers such as Nylon derivatives are hygroscopic and can soak up water in their fibers. This is the reason that you can dye lighter colored plastic darker using common RIT dye (remember all those gray HK stocks that were dyed from primer gray to black back in the 90s?).

    A quick look at some old Shotgun News ads show much has happened to the AR15 1960's design in just the last 20 years. As such I will not hazard a guess on where the AR15 design will go next as it continues to surprise me.
    I totally remember that! They came in what nearly amounted to battleship grey. Thank you for the knowledge dump.
    "That thing looks about as enjoyable as a bowl of exploding dicks." - Magic_Salad0892

    "The body cannot go where the mind has not already been."

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