Gas port size

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts
  • martkin64
    Bloodstained
    • Mar 2015
    • 38

    Gas port size

    What is the minimum and maximum gas port size for the AR15 Grendel? and what is everybody drilling theirs out too?
  • ricsmall
    Warrior
    • Sep 2014
    • 987

    #2
    Depends on gas length and length of barrel. On my gun, 22" rifle length, I enlarged mine to .0945. Works great. There were several threads some years back if they're still available. Lr52 has extensive knowledge on this.

    Richard
    Member since 2011, data lost in last hack attack

    Comment

    • martkin64
      Bloodstained
      • Mar 2015
      • 38

      #3
      Originally posted by ricsmall View Post
      Depends on gas length and length of barrel. On my gun, 22" rifle length, I enlarged mine to .0945. Works great. There were several threads some years back if they're still available. Lr52 has extensive knowledge on this.

      Richard
      Thank you Ricsmall...

      Comment

      • martkin64
        Bloodstained
        • Mar 2015
        • 38

        #4
        I have a 20 inch barrel...I was having feeding problems early on with my new Grendel.... I had the local gunsmith open up the Gas port to solve to problem. They stepped it up in small increments till the feeding issues went away and it was locking to the rear every time... But they went to .103 gas port size... It seems a bit big but it works great and I have not seen any sighn of over gas issues at all.... Is that a bit big?

        Comment

        • LRRPF52
          Super Moderator
          • Sep 2014
          • 8569

          #5
          MLGS 16" start at .078"
          MLGS 18" start at .076"
          RLGS start at .094"

          If you seal the gas block to the journal, and seal the tube to the block, you can get better gas pressure with smaller ports.
          NRA Basic, Pistol, Rifle, Shotgun, RSO

          CCW, CQM, DM, Long Range Rifle Instructor

          6.5 Grendel Reloading Handbooks & chamber brushes can be found here:

          www.AR15buildbox.com

          Comment

          • martkin64
            Bloodstained
            • Mar 2015
            • 38

            #6
            So is mine way over sized?

            Comment

            • LRRPF52
              Super Moderator
              • Sep 2014
              • 8569

              #7
              What bolt carrier, buffer, and recoil spring are you using?
              NRA Basic, Pistol, Rifle, Shotgun, RSO

              CCW, CQM, DM, Long Range Rifle Instructor

              6.5 Grendel Reloading Handbooks & chamber brushes can be found here:

              www.AR15buildbox.com

              Comment

              • martkin64
                Bloodstained
                • Mar 2015
                • 38

                #8
                Originally posted by LRRPF52 View Post
                What bolt carrier, buffer, and recoil spring are you using?
                The BCG is from Dead shot barrels. . (NB) the buffer is just a dpms AR 15 buffer and sprung......

                Comment

                • burnsome
                  Warrior
                  • Jun 2011
                  • 132

                  #9
                  Any info/recommendations for SBR Grendels? Specifically looking for 12 inch barrels if there's any info on that barrel length

                  Comment

                  Working...
                  X