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Thread: I want a short 6.5 Gas Gun

  1. #1
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    I want a short 6.5 Gas Gun

    I was at Arena Training Facility a few weeks ago, and a guy was running the hell out of a 16" LMT MWS in .308. He almost outshot me on targets out to 800y in some decent wind (I was using a hand built 20" 6.5 Bolt Gun) He was running a 4.5-32 NX8 (which was a bit too much optic, I'm planning on 2.5-20) I fell in love with that gun. It lacked the speed and BC to get reliable 66% IPSC hits at >1k, and there was obviously a good shooter behind it, but I think my next rifle will be a large frame gas gun. I've always dismissed them for several reasons.

    First, a .223 will do almost as well out of a 20" gas gun as a .308 will out of a 16" but with much less recoil and cost.

    Second, a bolt gun is always going to be more accurate than a semi-auto.

    Third, large frame gas guns are generally heavy.

    Finally, They aren't as "plug and play" as AR15s are, so I want a factory gun. But factory guns are generally chrome lined and generally speaking, CL barrels don't shoot as well as say, a .223 cut rifled Krieger. I know this doesn't matter to most of you, but I will only consider factory guns

    This guy's LMT kind of erased points 2-4. For typical target sizes a CL barrel will be more than accurate enough, and with that short barrel it wasn't heavy at all. Recoil didn't seem much worse than a 6.5 bolt gun.

    Questions:

    Who makes a quality factory 6.5 Gas Gun in 16-18"? What models are available?

    Is going 6.5 on a barrel that is 16-18" worth it over .308? I will most likely just shoot factory ammo out of this gun so caliber doesn't really matter too much. I know 6.5 blows .308 out of the water at 20" and beyond, but are the ballistics for a 16"-18" barrel much different?
    Last edited by Eurodriver; 07-19-20 at 11:38.
    Why do the loudest do the least?

  2. #2
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    From friends with short gas guns in 6.5, people make large variation in velocity. My 20” 6.5 would hit 2550 FPS with 140s. Friends have reported 2450-2500 FPS with a 16” and 140s.

    Another friend has a 14.5” and is reporting 2350-2400 with 130s.

    If one goes outside of 175 gr Matchkings, lots of gains can be had in .308, especially in shorter barrels.

    I like you, have spent time and $ sticking with 5.56 for the most part.

    Sniper’s Hide has a few threads on the topic.


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  3. #3
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    Why not just get an LMT in 6.5CM yourself?
    ETC (SW/AW), USN (1998-2008)
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  4. #4
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    Because I haven’t seen a 16” LMT MWS in 308 available for purchase, let alone 6.5” in my entire life.

    Quote Originally Posted by PracticalRifleman View Post
    From friends with short gas guns in 6.5, people make large variation in velocity. My 20” 6.5 would hit 2550 FPS with 140s. Friends have reported 2450-2500 FPS with a 16” and 140s.

    Another friend has a 14.5” and is reporting 2350-2400 with 130s.

    If one goes outside of 175 gr Matchkings, lots of gains can be had in .308, especially in shorter barrels.

    I like you, have spent time and $ sticking with 5.56 for the most part.

    Sniper’s Hide has a few threads on the topic.


    Sent from my iPhone using Tapatalk
    I get 2720 FPS out of my 20” with 140s. Is the velocity loss that much from a gas gun?

  5. #5
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    We’re you at the MPA PRS match? I was there I saw a couple people with large frame AR’s that we’re doing well. At the precision rifle expo last year I shot a 14 inch I think KAC in 6.5 and got hits at 800 it was impressive


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  6. #6
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    https://lmtdefense.com/product/mlkmws/

    Like this?

    In 6.5CM there is this...which I am sure you could have cut to 16”
    https://lmtdefense.com/product/6-5-show-special/
    Last edited by hotrodder636; 07-19-20 at 13:07.
    ETC (SW/AW), USN (1998-2008)
    CVN-65, USS Enterprise

  7. #7
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    Quote Originally Posted by Eurodriver View Post
    Because I haven’t seen a 16” LMT MWS in 308 available for purchase, let alone 6.5” in my entire life.



    I get 2720 FPS out of my 20” with 140s. Is the velocity loss that much from a gas gun?
    I think it largely depends on the gun. I didn’t get near 2720 in a 20” bolt gun.


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  8. #8
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    A complete build from citizen arms outside your parameters for “factory gun”?
    AQ planned for years and sent their A team to carry out the attacks, and on Flight 93 they were thwarted by a pick-up team made up of United Frequent Fliers. Many people look at 9/11 and wonder how we can stop an enemy like that. I look at FL93 and wonder, "How can we lose?". -- FromMyColdDeadHand

  9. #9
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    Quote Originally Posted by hotrodder636 View Post
    https://lmtdefense.com/product/mlkmws/

    Like this?

    In 6.5CM there is this...which I am sure you could have cut to 16”
    https://lmtdefense.com/product/6-5-show-special/
    Yeah like that, except in stock and ready to buy is what I’m looking for.

    It seems there are lots of reports of MWS not running well suppressed. Is that true?

  10. #10
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    https://sonsoflibertygw.com/13-9-6-5...de-barrel-1-8/

    If you are looking for 6.5 in a gas gun with a short barrel, I would look at a company that will replace it once you burn it out. I have one of Mike's original 308 ARs and it works great in 16". They just started offering these barrels.

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