Results 1 to 11 of 11
  1. #1
    Join Date
    Aug 2014
    Posts
    3
    Downloads
    0
    Uploads
    0

    New guy dissy questions...

    First let me say, thanks to all my brothers in arms. Been wanting to build a dissy for awhile now and was looking for some input. I have a Del Ton barrel set for rifle length gas. I believe the port is .098". I am gathering that this will need to be opened up for reliability. In my research .110" seems to be the recommended port size. What I'm wondering is about bolt carriers and buffers. I would like to run a fixed full length stock and maybe a supressor. Any ideas?

  2. #2
    Join Date
    Dec 2013
    Posts
    2,825
    Downloads
    0
    Uploads
    0
    are you going with a rifle length gas system or a mid/carbine?

  3. #3
    Join Date
    Aug 2014
    Posts
    3
    Downloads
    0
    Uploads
    0
    The barrel is already ported for rifle length.

  4. #4
    Join Date
    Sep 2010
    Location
    PNW
    Posts
    15,286
    Downloads
    0
    Uploads
    0
    Personally, I'd shoot it first before trying any tweaks to the system, especially permanent ones like opening up the gas port.

    Just use an A2 Rifle Buffer and a F/A BCG and see how she runs.

  5. #5
    Join Date
    Nov 2013
    Location
    Minneapolis, MN
    Posts
    571
    Downloads
    2
    Uploads
    0
    Wait. Let me see if I understand this. You have a 20" barrel with a rifle length gas system. You want to cut the barrel length down to 16" to make a dissy clone. You are wondering if the remaining barrel length with give you enough return pressure to cycle the BCG or if you'll have to widen the gas port as well. Am I following correct?
    It's difficult to soar with eagles, when you work with turkeys...

  6. #6
    Join Date
    Dec 2012
    Location
    Front Range of CO
    Posts
    343
    Downloads
    1
    Uploads
    0
    I believe what he has is this:

    .

    Already 16" with FSB on a rifle length shoulder, so there's no shortening involved.

    A larger port has been cited from time to time as increasing reliability for the rifle-ported dissies, but I really think that's going to be completely dependent on setup (carrier weight, action spring strength and buffer) and the ammo used. You've defaulted into the 5 oz rifle buffer - which might very well require drilling. Like UW said, try it in your planned config and if you need to drill it out, do it in small steps instead of jumping right to 0.11.

    Personally, I wouldn't even consider trying to tune one of these to run both with and without a can. The rifle-gassed dissy config seems finicky enough without adding more variables.

  7. #7
    Join Date
    Dec 2013
    Posts
    2,825
    Downloads
    0
    Uploads
    0
    I agree, do not try to tune one, it'll give you headaches.

  8. #8
    Join Date
    Nov 2013
    Location
    Minneapolis, MN
    Posts
    571
    Downloads
    2
    Uploads
    0
    Or, drill the FSB and tap it for a set screw. You can turn a fixed FB into an adjustable fairly easy.
    It's difficult to soar with eagles, when you work with turkeys...

  9. #9
    Join Date
    Nov 2013
    Location
    Minneapolis, MN
    Posts
    571
    Downloads
    2
    Uploads
    0
    That's the only way I can think to reliably adjust for both.
    Last edited by camomike; 23 August 2014 at 14:52.
    It's difficult to soar with eagles, when you work with turkeys...

  10. #10
    Join Date
    Aug 2014
    Posts
    3
    Downloads
    0
    Uploads
    0
    I was considering a threaded can and running it full time. I had thought of an adjustable gas block. No FSB no dissy. I like the idea of making one.

  11. #11
    Join Date
    Sep 2010
    Location
    PNW
    Posts
    15,286
    Downloads
    0
    Uploads
    0
    Quote Originally Posted by MCrab67 View Post
    I was considering a threaded can and running it full time. I had thought of an adjustable gas block. No FSB no dissy. I like the idea of making one.
    Just run a BCM 12.5" Kino

Posting Permissions

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