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  1. #1
    Machine Gunner electronman1729's Avatar
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    Default AR 11.5" Carbine vs 12.5" Mid-Length

    Thoughts on the 11.5" Carbine vs 12.5" Mid-Length?
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  2. #2

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    With a brake, 12.5. Flash hider or a can, 11.5.

    I like to keep loud noises as far away from me as possible.
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  3. #3
    Machine Gunner electronman1729's Avatar
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    Quote Originally Posted by Hoser View Post
    With a brake, 12.5. Flash hider or a can, 11.5.

    I like to keep loud noises as far away from me as possible.
    Is the blow gas in the face any different between the two?
    Deplorable millennial born 30 years too late

  4. #4
    Zombie Slayer kidicarus13's Avatar
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    Quote Originally Posted by Hoser View Post
    With a brake, 12.5. Flash hider or a can, 11.5.

    I like to keep loud noises as far away from me as possible.
    "Loud" is directly proportional to age. But ya, I vote for 12.5"
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  5. #5
    Varmiteer zimagold's Avatar
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    Quote Originally Posted by electronman1729 View Post
    Is the blow gas in the face any different between the two?
    I?ve been through several barrels in both lengths. Gas in face is mostly port size, charging handle, suppressor, and timing. I prefer 12.5 with carbine gas. The difference with the other variables optimized is small. Now 10.5 starts to get sporty as you start to get noticeably less flexibility in tuning.

    12.5 is the shortest I will go with a K type suppressor. 11.5 gets a full size. Something to consider. For reference, I don?t do brakes on barrels under 14.5 without a suppressor.

  6. #6
    Freeform Funkafied funkfool's Avatar
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    What about shorter barrels. 7.5 or 8.5 - opinions? Saw a great deal on a 7.5, but no experience with shorter uppers.
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  7. #7
    Varmiteer zimagold's Avatar
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    Default AR 11.5" Carbine vs 12.5" Mid-Length

    7.5 and 8.2 inch 556 without a suppressor is kinda like a mini flash bang in front of your face every round. The fun value goes away quickly.

    I had difficulty sufficiently suppressing one even with a full size suppressor (M4-2K 8th).

    I used to say ballistics were heavily impacted, but I think a 7.5 is more viable now with some of the hotter soft point 64gr bonded loads, ex. RA556B. So with a suppressor, maybe worth it.

    I still have an 8.5 inch gun for compact shooting, but it is 300blk.
    Last edited by zimagold; 05-15-2022 at 13:03.

  8. #8
    The "Godfather" of COAR Great-Kazoo's Avatar
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    Quote Originally Posted by electronman1729 View Post
    Is the blow gas in the face any different between the two?
    No. not with the ones i run, even with spartan / gibbs style side charging uppers. I went from brakes, to hiders, which lessens that small blowback. The only way i noticed to reduce, to almost zero blowback. Was running a piston system.
    Last edited by Great-Kazoo; 05-15-2022 at 23:58.
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  9. #9
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    Linear comp on a 10.5 is actually not bad. Before the comp with a plain FH it was really bad.

  10. #10
    Prefers it FIRM Skully's Avatar
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    My newest love is the 13.9" pinned a Dead Air Flash hider exactly 16.1" not too short, not too long (avoid the pistol or the SBR route)..........and with a can perfecto!

    I know you asked about 11.5 or 12.5, I have had both, (though Carbine gas) flash hider, I could not tell the difference between either in sound or shooting it.................. but either is better than a 10.5". ...................both sizes are great with a can.

    Faxon makes a 11.5 mid length, but recommends an adjustable gas block. Never shot one though but I see 50/50 of people loving or hating it.
    Last edited by Skully; 06-15-2022 at 22:07.
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