CanadianGunNutz.com logo, Firearms News and Classifieds in Canada

Page 63 of 75 FirstFirst ... 4353555657585960616263646566676869707173 ... LastLast
Results 621 to 630 of 746

Thread: Modern Sporter builds Q&A

  1. #621
    CGN Ultra frequent flyer griffin86's Avatar
    Join Date
    May 2009
    Location
    Saskatchewan
    Posts
    4,870
    I bet it’s the gas block. I believe the superlative is fully open at 4.5 turns out.
    CGN Weekly Schedule
    Monday: Can't access the EE! Tuesday: Non-restricted rifles like AR-15? Wednesday: Difference between 223 and 556? Thursday: 9 or 45? Friday: Bear Defense thread Saturday: Why is this prohibited? Sunday: Zombie thread

  2. #622
    CGN Regular greg olmstead's Avatar
    Join Date
    Apr 2013
    Location
    alberta
    Posts
    440
    Fully closed is all the way in cw.
    Fully open is 4.5 turns out ccw.
    Bleed off is past 4.5 turns out ccw.
    Step 1: Buy Guns
    Step 2: Get Wife

  3. #623
    GunNutz Sqr's Avatar
    Join Date
    Jan 2015
    Location
    Ontario
    Posts
    4,234
    Quote Originally Posted by edge9382 View Post
    I'm having an extremely difficult time getting mine to cycle. Rifle length gas, carbine buffer (2.9oz) and carbine tube, Superlative Arms adjustable gas block. It's acting like it's undergassed no matter what I set the gas block to, I've made sure the port on it is aligned with the barrel port.

    Is there anyone with this combination that's had success?
    Switch out the adjustable gas block to a mil-spec piece. Check the carbon ring around the port for proper alignment. What extension tube do you have, mil-spec or commercial? What bolt carrier are you running, Full Auto, semi Auto (full semi Auto) or colt modified?
    CCFR NRA CSSA

  4. #624
    CGN Regular GUNNZ's Avatar
    Join Date
    Jan 2016
    Posts
    140
    What procedure did you use to align the gas block? If you set it to fully open and it's still undergassed, you can be pretty sure you have an alignment issue. I'd check the gas key and gas tube length as well.

  5. #625
    CGN Ultra frequent flyer ssapach's Avatar
    Join Date
    Dec 2013
    Location
    Alberta
    Posts
    2,675
    Quote Originally Posted by edge9382 View Post
    I'm having an extremely difficult time getting mine to cycle. Rifle length gas, carbine buffer (2.9oz) and carbine tube, Superlative Arms adjustable gas block. It's acting like it's undergassed no matter what I set the gas block to, I've made sure the port on it is aligned with the barrel port.

    Is there anyone with this combination that's had success?
    I have rifle length gas. I also had trouble at first. Turned out my barrel port was undersized. I opened it up to 0.099" and it's working now.

    For what it's worth, that's with 18.6" barrel, full mass Colt BCG and H1 buffer.

  6. #626
    Super GunNutz
    Join Date
    Mar 2016
    Location
    South of most
    Posts
    324
    Anyone have info on 18.6” MIDLENGTH gas port size? Can’t seem to find any info on this.
    I want you to be pleased with your purchase, so do not hesitate one bit to ask questions before purchase! If we do decide to go forward with payment, I assume that you are satisfied with all info leading up to the payment. This is a polite as-is disclaimer.

    I ship at least once a week on my day off. If you find this reasonable, please proceed to EMT @ pinakaleada@gmail.com

  7. #627
    GunNutz
    Join Date
    Mar 2009
    Location
    northern BC
    Posts
    85
    Another thing to look at is the gas rings on your bolt make sure all your seams are NOT aligned.

  8. #628
    GunNutz Sqr's Avatar
    Join Date
    Jan 2015
    Location
    Ontario
    Posts
    4,234
    Quote Originally Posted by ssapach View Post
    I have rifle length gas. I also had trouble at first. Turned out my barrel port was undersized. I opened it up to 0.099" and it's working now.

    For what it's worth, that's with 18.6" barrel, full mass Colt BCG and H1 buffer.
    That .99 is very large for a rifle length. What diameter and what is the OAL of the barrel?

    CCFR NRA CSSA

  9. #629
    CGN Ultra frequent flyer ssapach's Avatar
    Join Date
    Dec 2013
    Location
    Alberta
    Posts
    2,675
    Quote Originally Posted by Sqr View Post
    That .99 is very large for a rifle length. What diameter and what is the OAL of the barrel?

    18.6" barrel and 0.750" gas block.

    I couldn't actually find solid info on gas port size for 18.6" barrels, but did see mentions of 0.098" for 20" barrels, even some random internet forum comments about up to 0.109".

    Rifle works now with a non-adjustable gas block at the moment. I'm no expert, but it sure doesn't feel over gassed and was ejecting nicely at a 3 o'clock position during my test firing.

  10. #630
    Super GunNutz
    Join Date
    Mar 2016
    Location
    South of most
    Posts
    324
    Quote Originally Posted by Sqr View Post
    That .99 is very large for a rifle length. What diameter and what is the OAL of the barrel?

    I’ve alao seen these charts and they often never have info on what a MIDLENGTH 18.6” should be. I asked RWA about IBI and their answer was 0.092”, but I think the journal is larger than 0.750”, so a 0.750” would be smaller. Anyone else have info?
    I want you to be pleased with your purchase, so do not hesitate one bit to ask questions before purchase! If we do decide to go forward with payment, I assume that you are satisfied with all info leading up to the payment. This is a polite as-is disclaimer.

    I ship at least once a week on my day off. If you find this reasonable, please proceed to EMT @ pinakaleada@gmail.com

Posting Permissions

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