Page 2 of 7 FirstFirst 1234 ... LastLast
Results 11 to 20 of 70

Thread: 14.5 Inch Mid Length ARs.....Ammo Sensitive?

  1. #11
    Join Date
    Jun 2012
    Location
    northern CA
    Posts
    895
    Feedback Score
    2 (100%)
    I have 2 bcm 14.5 mids. They have run from day one with low powered pmc. They both have not had a single malfunction, and lock back on empty. I put an h2 in one and it ran fine, but would occasionally not lock back on an empty mag. I also have a 16 inch midlength it will run with the h2, and never fail to lock the bolt back on an empty mag.

    Like stickman, and iraqgunz said if you buy one buy it from a company that is known to produce reliable 14.5 mid lengths. From what i have read i believe bcm has done the most work to get there mid length system just right. I have shot some of my friends mid lengths and they just do not feel the same.

    I do not know if it is just me, but the first time i shot my bcms the recoil impulse was so smooth. To me it was like the difference with 9 & 45. The carbine system was more of a jab, and the mid was more like a gentle push to the shoulder.

  2. #12
    Join Date
    May 2009
    Posts
    235
    Feedback Score
    17 (100%)
    I have 2 14.5" middy's; one by BCM and one by DD. Both eat anything and have been perfectly reliable with carbine, H1, H2 and A5 buffers.

  3. #13
    Join Date
    Aug 2009
    Posts
    49
    Feedback Score
    4 (100%)
    I own a BCM 14.5 mid-length and have experienced no ammo-related failures. I have only fired about 5000 rounds through it, though.

  4. #14
    Join Date
    Aug 2009
    Location
    Texas
    Posts
    1,743
    Feedback Score
    47 (100%)
    Mine used too- then I got retarded and started trying to adapt the A5 with enhanced carriers, every A5 buffer I could buy, etc. And now it will not cycle one round of anything "cheap." Like others have said- buy from a reputable company and shoot it in the configuration it arrives in. Have fun!


    Sent from my iPhone using Tapatalk; coherency may be in jeopardy.
    Matthew 10:28

  5. #15
    Join Date
    Apr 2009
    Location
    FL -Where it's summer 10.5 months out of the year
    Posts
    4,114
    Feedback Score
    17 (100%)
    Stick with an H buffer or a Vltor A5 system with a standard Colt or Brownells CS rifle spring and you'll be fine.

    I always advocate upgrading to a MacFarland single piece gas ring due to the better gas seal.

    I have a thread in the technical forum that is exploring the limit of functionality with a BCM 14.5" middy.

    I'm running an LMT enhanced carrier, MacFarland ring, Springco Extractor spring, and Vltor A5 system with the A5H3 (6.1 oz buffer) and the Springco Green spring (which is stronger than the std rifle spring).

    I run Tula .223 55gr fmj even when dirty and it locks back on empty. Though I've eliminated a LOT of the internal friction of the gun by hand-polishing the bearing surfaces on the outside of the bolt carrier and the sides of the gas key. I also use liberal amounts of Slip 2K EWL.

    There is no standard, but BCM pioneered the mass production of the format and is the only manufacturer to do cyclic rate tests on full-auto lowers that I know of. Noveske has also been building in much smaller numbers the Afghan 14.5" middy but they use a larger gas port than BCM.

    If you stick with BCM, you'll be fine with an H buffer and plenty of good lube.
    Last edited by BufordTJustice; 11-04-12 at 00:49.

  6. #16
    Join Date
    Apr 2009
    Location
    FL -Where it's summer 10.5 months out of the year
    Posts
    4,114
    Feedback Score
    17 (100%)
    Quote Originally Posted by sadmin View Post
    Mine used too- then I got retarded and started trying to adapt the A5 with enhanced carriers, every A5 buffer I could buy, etc. And now it will not cycle one round of anything "cheap." Like others have said- buy from a reputable company and shoot it in the configuration it arrives in. Have fun!


    Sent from my iPhone using Tapatalk; coherency may be in jeopardy.
    I feel partially responsible for the bullshit.

    In fiddling some more, the polishing of the BC is VITAL to getting this craziness to work.

  7. #17
    Join Date
    Nov 2012
    Posts
    8
    Feedback Score
    0
    Hey guys I have just ordered a dd mk18 in a 10.3 " barrel. Should I be concerned with the performance of this rig. When I served the shortest barrelled version we shot was a 16 " carbine version. So am I gonna have issues with performance on this rig. I bought it strictly as a cqb rig with shots limited to 300 yards with a red dot.

  8. #18
    Join Date
    Jul 2009
    Posts
    298
    Feedback Score
    0
    I have a 14.5" Midlength that I had assembled using a DD CHF barrel and Noveske BCG.

    When I first took it out for function testing, I started with a carbine buffer and ran 100 rounds with no issues. Then, I tested it with a H buffer, ran 100 rounds and no issues there. Followed that up with a H2 and ran another 100 rounds no issues. Figured that set up was good to go and have left it that way for the past two years.

    This rifle has been my primary rifle for the past two years and I've taken 3 carbine classes with it and haven't had a malfunction to date.

    I mainly use PMC Bronze 55gr FMJ, Federal 5.56, 55gr FJM, and AE .223 55gr FMJ cause I typically buy in bulk and that's what I usually find deals on.

    My next 14.5" Middy is going to be a BCM LW and I'm pretty confident it will treat me as good as the DD barreled Middy has this past two years.
    Last edited by jbo723; 11-04-12 at 01:36. Reason: spelling

  9. #19
    Join Date
    Jan 2008
    Location
    AZ-Waging jihad against crappy AR's.
    Posts
    24,902
    Feedback Score
    104 (100%)
    Please post in the NFA area as this has nothing to do with this subject.

    Quote Originally Posted by albertanhb View Post
    Hey guys I have just ordered a dd mk18 in a 10.3 " barrel. Should I be concerned with the performance of this rig. When I served the shortest barrelled version we shot was a 16 " carbine version. So am I gonna have issues with performance on this rig. I bought it strictly as a cqb rig with shots limited to 300 yards with a red dot.



    Owner/Instructor at Semper Paratus Arms

    Facebook: https://www.facebook.com/SemperParatusArms/

    Semper Paratus Arms AR15 Armorer Course http://www.semperparatusarms.com/cou...-registration/

    M4C Misc. Training and Course Announcements- http://www.m4carbine.net/forumdisplay.php?f=141

    Master Armorer/R&D at SIONICS Weapon Systems- http://sionicsweaponsystems.com

  10. #20
    Join Date
    Oct 2009
    Posts
    14
    Feedback Score
    -1 (0%)
    What is the gas port size BCM or DD is using on the middy 14.5's

Page 2 of 7 FirstFirst 1234 ... 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
  •