Page 2 of 2 FirstFirst 12
Results 11 to 20 of 20

Thread: Not a build, an assembly...but still. Lightweight hammer-forged midlength...

  1. #11
    Join Date
    Jul 2006
    Posts
    4,177
    Feedback Score
    3 (100%)
    Test fired and zeroed MBUS and Aimpoint, as well as tested function with the HALO. Obviously the standard carbine buffer is not enough with the suppressor mounted, so I'm going to do my standard buffer test tomorrow and see how heavy I can go. I was using XM193 today, and I have some .223 and some Silver Bear on the plate for tomorrow just to challenge the buffers.

    Interestingly enough, off the bag the gun showed NO POI change with the suppressor mounted at the zero distance of 50 yards. This is not the result I would have expected with such a light barrel - my hypothesis is that because the MOE is not a free-float, the barrel is actually getting support either from the hand or the rest. I'm going to test this theory tomorrow as well.

    So far, it sure seems like a winner.

  2. #12
    Join Date
    May 2010
    Posts
    847
    Feedback Score
    15 (100%)
    sweet build. Just got my BCM BFH 14.5 upper today. Putting it together with a MOE from IWC, on a BCM lower. Stock choice is still undetermined. Light and KISS is the way to go. My barrel is govt profile, but still light compared to my other carbine.

  3. #13
    Join Date
    May 2006
    Location
    VA/OH
    Posts
    29,631
    Feedback Score
    33 (100%)
    Quote Originally Posted by QuietShootr View Post
    Test fired and zeroed MBUS and Aimpoint, as well as tested function with the HALO. Obviously the standard carbine buffer is not enough with the suppressor mounted, so I'm going to do my standard buffer test tomorrow and see how heavy I can go. I was using XM193 today, and I have some .223 and some Silver Bear on the plate for tomorrow just to challenge the buffers.

    Interestingly enough, off the bag the gun showed NO POI change with the suppressor mounted at the zero distance of 50 yards. This is not the result I would have expected with such a light barrel - my hypothesis is that because the MOE is not a free-float, the barrel is actually getting support either from the hand or the rest. I'm going to test this theory tomorrow as well.

    So far, it sure seems like a winner.
    With a can and 5.56 ammo, you should be able to go all the way up to an H3 buffer.

    Do not use a rest. Use the magazine as the support and see what kind of shift you get at 100yds.



    C4
    Last edited by C4IGrant; 11-15-11 at 16:35.

  4. #14
    Join Date
    Jul 2006
    Posts
    4,177
    Feedback Score
    3 (100%)
    Buffer test results:

    I tested H, h2, and 9mm with ammo ranging from Silver Bear to XM193, to Mk262, suppressed and unsuppressed. Results - the gun works up to 9mm with all ammo even unsuppressed, but occasionally fails to lock open with SB if it's held loosely. I'm thinking that H3 or 9mm is probably not enough margin of safety to allow it to run when really filthy, so I'm probably going to settle on H2.

    I'll retest the POI shift with no support, and if I get a dramatic shift I'll know my theory was correct. And actually, I'd be okay with that, because I'm rarely going to be shooting one-handed, offhand, suppressed at such a distance that POI shift will be an issue.

  5. #15
    Join Date
    May 2010
    Posts
    262
    Feedback Score
    35 (100%)
    Quote Originally Posted by krichbaum View Post

    What handguard QD mount are you running there? Is that IWC?

    Nice gun. Very similar to my most recent build.

    Sent from my Sprint EVO via Tapatalk

  6. #16
    Join Date
    Dec 2007
    Posts
    439
    Feedback Score
    11 (100%)
    Yes, IWC.

  7. #17
    Join Date
    Jul 2006
    Posts
    4,177
    Feedback Score
    3 (100%)



  8. #18
    Join Date
    Aug 2010
    Posts
    12,145
    Feedback Score
    43 (100%)
    Hey man, your rifle looks real nice.

    If I could make one suggestion, it would be to get an IWC mount for your light. You'll get a better grip and light activation as the mount pushes the light out in front of the handguard and it eliminates the rail section.

    Food for thought.

    Edit: Exactly what Krichbaum has in his picture.
    Last edited by Eurodriver; 11-16-11 at 11:29.
    Why do the loudest do the least?

  9. #19
    Join Date
    Jul 2006
    Posts
    4,177
    Feedback Score
    3 (100%)
    Quote Originally Posted by Eurodriver View Post
    Hey man, your rifle looks real nice.

    If I could make one suggestion, it would be to get an IWC mount for your light. You'll get a better grip and light activation as the mount pushes the light out in front of the handguard and it eliminates the rail section.

    Food for thought.

    Edit: Exactly what Krichbaum has in his picture.
    Only thing with that - I'm not a big guy, I am two or three inches taller than Pat Rogers, for perspective. I find the Magpul-style left arm straight and hand at the end of the handguard to be uncomfortable and slower (for me, not for anyone else.) than having my hands closer together.

  10. #20
    Join Date
    Dec 2007
    Location
    Fort Collins Colorado
    Posts
    2,672
    Feedback Score
    4 (100%)
    Quote Originally Posted by Todd.K View Post
    I'm OK with people who like a heavier barrel. It's just people who like M4/A2 profiles but talk down about lightweight barrels.
    there's no accuracy/longevity/heat sink/soak benefit at all from the gov profile is there? It would seem if anything you'd want to have the barrel taper the other way- heavy at the chamber....

    The whole gov profile thing happened during vietnam because guys were using the front of their barrels as pry bars right?

    i have a gov profile barrel, but not by choice.

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
  •