Page 4 of 5 FirstFirst ... 2345 LastLast
Results 31 to 40 of 44

Thread: BCM Mid length in stock

  1. #31
    Join Date
    Nov 2008
    Posts
    565
    Feedback Score
    0
    I have missed every single one of these for four months now.

    This is beyond not funny anymore....

  2. #32
    Join Date
    Dec 2008
    Posts
    32
    Feedback Score
    0

    Middy

    Quote Originally Posted by tusk212 View Post
    It never fails. They always come in when I am nowhere near my computer.
    +1 (Charlie Brown groan....)

  3. #33
    Join Date
    Sep 2007
    Location
    AZ
    Posts
    27,214
    Feedback Score
    14 (100%)
    Quote Originally Posted by Mark71 View Post
    I was downstairs watching 24.

    BANNED TO ARFCOM YOU SHOULD BE.

  4. #34
    Join Date
    Mar 2009
    Location
    Louisville, KY
    Posts
    226
    Feedback Score
    5 (100%)

    Mid-length upper

    Can anyone tell me what the advantage or disadvantage of a mid-length uppper is? I never really considered one until now when I need an extra uppper for a new build. Is the mid-length gas system better?
    Thanks,

  5. #35
    Join Date
    Jan 2009
    Posts
    105
    Feedback Score
    1 (100%)
    Quote Originally Posted by meausoc View Post
    Can anyone tell me what the advantage or disadvantage of a mid-length uppper is? I never really considered one until now when I need an extra uppper for a new build. Is the mid-length gas system better?
    Thanks,
    The lengthened gas system translates into several thousand less PSI of gas pressure, which means less wear on your bolt carrier group and reduced recoil.

  6. #36
    Join Date
    Feb 2009
    Location
    NC
    Posts
    353
    Feedback Score
    0

    Middie pros and cons

    Quote Originally Posted by meausoc View Post
    Can anyone tell me what the advantage or disadvantage of a mid-length uppper is? I never really considered one until now when I need an extra uppper for a new build. Is the mid-length gas system better?
    Thanks,
    The differences have been discussed on various threads around here, though I am not aware of any one thread for pro/con discussion of middies, so I'll put this here.

    Disadvantage(s):
    One significant disadvantage of a mid-length system is that it effectively places a lower limit on barrel length. Beyond that, I am not aware of any other minuses, though I'm sure others here are far more knowledgeable on this topic.

    Advantage(s):
    The mid-length gas system produces lower pressures, along with all that that implies. As I understand it, this means higher reliability and lower wear on the internals. Lower felt recoil is one side effect. Another implication of this seems to be that my middie is a bit more forgiving of lower pressured ammo (this stands to reason, based on what I understand of the physics involved). Again, others are more qualified to discuss the particulars.

    The thread about the BCM middie contains a decent amount of info, as well.

    From:
    https://www.m4carbine.net/showthread...069#post265069

    Quote Originally Posted by gotm4
    The midlength gas system being longer lowers the amount of gas pressure at the gas port thus heavier buffers aren't required. CAR would work fine, H will work but with weaker ammo or a dirtier gun it will likely jam (short stroke, running to slowing to feel as good as a faster cycling gun).

    H, H2, H3 and buffers were designed for CAR and shorter gas systems. Do they sometimes work with longer than CAR gas systems? Of course.

    Think about the design of the AR15, it was designed as a rifle. It had a 5.2oz rifle length buffer and a reduced power buffer spring. Then along came the CAR length rifles XM177 it with short barrels because the gas port was much closer to the muzzle the gas port needed to be make larger. The larger gas port and shorter gas tube sends more gas volume and higher pressure through the gas tube, this results is higher bolt velocity and more wear on parts etc.
    To ensure that the shorter gun has enough has volume and enough time to completely cycle the gas ports were left large, but to slow the violent bolt velocity heavier buffers were designed.

    CAR buffers springs are shorter and stiffer than rifle length buffer springs.

    CAR buffers = 3.0oz
    H buffers = 3.8oz
    H2 buffers = 4.6oz
    H3 buffers = 5.5oz
    Rifle buffers = 5.2oz

    Gas port (that hole in the barrel) pressures:
    Rifle = 13.5K
    Midlength = 19K
    CAR = 26K

  7. #37
    Join Date
    Apr 2007
    Posts
    216
    Feedback Score
    0
    A minute late and a dollar short again. Re-entered my email address again for the notification.
    "In God we trust, everyone else keep your hands where we can see them."

  8. #38
    Join Date
    Oct 2007
    Location
    Littleton, CO
    Posts
    3,921
    Feedback Score
    1 (100%)
    As much as I really want one I've decided to just give up on one of these for the time being. I'll sincerely try again in 6-9 months when sanity has taken hold again.

  9. #39
    Join Date
    Mar 2008
    Location
    Gonzales, LA
    Posts
    105
    Feedback Score
    1 (100%)
    Quote Originally Posted by decodeddiesel View Post
    As much as I really want one I've decided to just give up on one of these for the time being. I'll sincerely try again in 6-9 months when sanity has taken hold again.
    I'm with you on that one. I get off of work at midnight, and every time I get home and see the email notification from Bravo Company sent hours earlier, I know I missed them again and I die a little more inside.

  10. #40
    Join Date
    Oct 2007
    Location
    Littleton, CO
    Posts
    3,921
    Feedback Score
    1 (100%)
    Quote Originally Posted by TheLefty View Post
    I'm with you on that one. I get off of work at midnight, and every time I get home and see the email notification from Bravo Company sent hours earlier, I know I missed them again and I die a little more inside.
    How true. LOL.

Page 4 of 5 FirstFirst ... 2345 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •