Page 2 of 2 FirstFirst 12
Results 11 to 19 of 19

Thread: Proper Buffer for 20" Rifle Gas Upper on Carbine Lower?

  1. #11
    Join Date
    Jul 2011
    Location
    Oklahoma
    Posts
    171
    Feedback Score
    0
    I shot a bunch of steel cased with a 20" BCM using H and carbine buffers without issue.

  2. #12
    Join Date
    Dec 2009
    Location
    Utah
    Posts
    8,799
    Feedback Score
    3 (100%)
    You can run any properly gassed upper on a lower with an H, H2, A5H2 or rifle buffer (used with the correct RE & spring).
    The number of folks on my Full Of Shit list grows everyday

    http://i115.photobucket.com/albums/n289/SgtSongDog/AR%20Carbine/DSC_0114.jpg
    I am American

  3. #13
    Join Date
    Nov 2018
    Posts
    1,560
    Feedback Score
    2 (100%)
    Bumpin' this as I've changed my mind....I'd been running an 18" with a carbine buffer.

    Reliability was perfect...but in experimenting with an H2, I have to admit the gun is less jumpy, and runs more smoothly. This became very apparent when running drills like the MNQ.

    Still 100% reliable, and runs smoother this way. Will be running it with H2 going forward.

  4. #14
    Join Date
    Feb 2016
    Location
    North Alabama
    Posts
    5,310
    Feedback Score
    19 (100%)
    Quote Originally Posted by ViniVidivici View Post
    Bumpin' this as I've changed my mind....I'd been running an 18" with a carbine buffer.

    Reliability was perfect...but in experimenting with an H2, I have to admit the gun is less jumpy, and runs more smoothly. This became very apparent when running drills like the MNQ.

    Still 100% reliable, and runs smoother this way. Will be running it with H2 going forward.
    I'm slowly coming to believe that H2 is the perfect carbine buffer for everything.

  5. #15
    Join Date
    Jan 2019
    Location
    Canyon Ferry MT
    Posts
    229
    Feedback Score
    0
    I've used the standard buffer, and the H3. 20" rifle-gas 5.56. They both seem to run just fine.

    The H3 buffer is almost the same weight as the rifle buffer, around 5 oz. I believe the standard carbine spring feels a bit stiffer than the rifle spring, but that would make sense with less travel.

    Well, maybe buffer travel isn't so different when you consider the longer length of the rifle buffer.
    Last edited by MontanaMarine; 12-03-19 at 12:24.

  6. #16
    Join Date
    Mar 2015
    Posts
    1,725
    Feedback Score
    0
    The Army conversion kit to put a collapsible stock on a 20 inch barrel rifle, uses a standard carbine spring and an "H6" buffer.

    An H6 buffer is nothing but an H3 buffer with the weights cut to half the original length and twice as many of them. The weight for the H6 and H3 is the same, the only reason the Army uses the H6 is it works better in full auto.

  7. #17
    Join Date
    Jun 2006
    Location
    VA
    Posts
    10,781
    Feedback Score
    17 (100%)
    H2 IIRC is what the Canadians used.
    Chief Armorer for Elite Shooting Sports in Manassas VA
    Chief Armorer for Corp Arms (FFL 07-08/SOT 02)

  8. #18
    Join Date
    Nov 2018
    Posts
    1,560
    Feedback Score
    2 (100%)
    Yeah, I've also upgraded an 11.5" to sn H2. Have run it with an H for the last several hundred rounds, and it's also been 100% reliable, but it too is smoother with the H2.

  9. #19
    Join Date
    Aug 2011
    Location
    N.E. OH
    Posts
    7,591
    Feedback Score
    0
    Quote Originally Posted by MontanaMarine View Post
    I've used the standard buffer, and the H3. 20" rifle-gas 5.56. They both seem to run just fine.

    The H3 buffer is almost the same weight as the rifle buffer, around 5 oz. I believe the standard carbine spring feels a bit stiffer than the rifle spring, but that would make sense with less travel.

    Well, maybe buffer travel isn't so different when you consider the longer length of the rifle buffer.
    Same travel as the bolt stroke is the same.
    The difference is the compression % of the spring. The rifle is more uniform/flat, the carbine increases resistance with travel more.

Page 2 of 2 FirstFirst 12

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
  •