Page 1 of 2 12 LastLast
Results 1 to 10 of 16

Thread: Will I need an adjustable gas block?

  1. #1
    Join Date
    Mar 2016
    Posts
    193
    Feedback Score
    0

    Will I need an adjustable gas block?

    Hello All,

    I'm building out a new 223 rifle that is just for longer range target shooting. It's going to have a 20" barrel with a rifle length gas system. I would like to be able to shoot it both suppressed and unsupressed.
    Will I need an adjustable gas block for this? My only suppressor experience is with my 300 BLK SBR and it just magically works with both types of ammo.

    Thanks,

    JRC

  2. #2
    Join Date
    Jul 2008
    Location
    Texas
    Posts
    3,742
    Feedback Score
    1 (100%)
    No, a properly sized gas port will work just fine suppressed and unsuppressed from carbine length systems all the way to rifle length systems.

    If you want it to run "optimally" suppressed, then an adjustable gas block can accomplish that, but if it's the correct size with quality ammo it will be reliable without any kind of doohickeys. It will cycle slightly harsher, but that's going to be mitigated a great deal by the rifle length system.

  3. #3
    Join Date
    Oct 2015
    Posts
    501
    Feedback Score
    0
    A rifle or a5 buffer setup would be ideal. It should help compared to a carbine buffer

    Sent from my SM-G900P using Tapatalk

  4. #4
    Join Date
    Mar 2016
    Posts
    193
    Feedback Score
    0
    Yes. I'm going to use a Gen2 Magpul PRS stock so it's going to have a rifle buffer.

    The thing is that I have a Geissele gas block left over from buying one of their rails and I'm trying to decide if I should use it.

    Perhaps I should contact Ballistic Advantage and see what their gas port size is.

    Thanks,

    JRC
    Quote Originally Posted by daniel87 View Post
    A rifle or a5 buffer setup would be ideal. It should help compared to a carbine buffer

    Sent from my SM-G900P using Tapatalk

  5. #5
    Join Date
    Sep 2007
    Location
    AZ
    Posts
    32,833
    Feedback Score
    14 (100%)
    You shouldn't need an adjustable. Longer systems are more forgiving in my experience.

  6. #6
    Join Date
    May 2011
    Posts
    2,114
    Feedback Score
    0
    What size is the gas port?
    It is possible that you may not have to do much to do, but it is also possible that you may have a lot to do.

  7. #7
    Join Date
    May 2014
    Posts
    89
    Feedback Score
    0
    Need? No. Want? Yes. Less recoil, gas in face, parts wear, and noise.

  8. #8
    Join Date
    Jan 2011
    Location
    North Carolina
    Posts
    488
    Feedback Score
    12 (100%)
    try it before buying anything, depending on the ammo as well

  9. #9
    Join Date
    Jan 2017
    Location
    Grays Creek, NC
    Posts
    476
    Feedback Score
    1 (100%)
    Do you want to be the guy at the range with a weapon that isn't working because you thought you might not need it going from un-suppressed to suppressed?

    Do you care about downtime after you realize you needed one and now have to order and remove the old and reinstall the adjustable?

    For my last build, I decided while it was apart I was going to use the adjustable just in case. I bland to load my own rounds someday as well so I can adjust for that as well.
    DDM4V11 PRO, SSA-E, Vortex viper 6.5x20-44mm
    BCM 16 KMR-A, SSA, EO Tech EXPS 3-0, G-33 magnifier
    S&W M&P Sport II, BCM PNT, Aimpoint PRO
    BCM 9" 300 BLK upper/KAC lower/DD BCG/ BCM PNT/ Aimpoint T1
    Noveske upper/lower/handguard, 20" 6.5 Grendel Bartlein Barrel, SSA-E,Vortex viper GEN II PST 5x25-50mm
    16" BCA .223 Wylde "budget rifle", SPARC AR
    Retired Army Airborne Infantry

  10. #10
    Join Date
    Mar 2017
    Location
    Shenandoah, Earth
    Posts
    170
    Feedback Score
    11 (100%)
    Adjustable gas blocks can tune a suppressed/unsuppressed rifle or carbine nicely. I use an SLR Sentry on my hunting AR in 6.8spcii, and it performs well.

    It does introduce an additional point of maintenance, and possibly an additional point of failure. If set to "suppressed", the rifle may not lock back when unsuppressed. It requires that a 2mm hex key be available. If not cleaned/lubed it can bind.

    With that in mind, my "fighting rifle" (12.5" Noveske 5.56x45) does ~not~ have an AGB, even though it would cycle smoother when suppressed with one.

Page 1 of 2 12 LastLast

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
  •