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Thread: Stupid Question: 12.5" + 4" linear comp?

  1. #11
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    Why not go 13.7" with a Noveske KX-3 or 5?
    USMC MSGT Ret. 1371

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  2. #12
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    This idea makes no sense to me. You're talking maybe 1.5 in of overall difference yet you give up velocity over a 16. This setup literally has no advantage over a 16in barrel and has s couple pretty big disadvantages.


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  3. #13
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    Quote Originally Posted by Bimmer View Post
    I guess that's the crux of my question: Assuming the bigger linear comp works, would it be worth giving up 150fps or so to reduce blast?
    No.

    FYI:

    "Machined from billet 6061 AL, the KVP XL Linear comp is an excellent light weight, highly functional compensator for your pistol caliber builds!"

    I'm not sure how a pin and weld job works with an aluminum muzzle device. I suppose you can still pin it - but weld it? ATF has some rather detailed requirements about welding or high temp silver solder and I'm not sure you can do either one without damaging the aluminum "comp."

    Also, I have a suspicious feeling that ATF is going to look into this 4" long "linear compensator" and probably frown on it. Remember how ATF forced a recall of dummy suppressors that had no baffles, but were a long open tube with a small hole at the end? This looks similar.

    I'm optimistic that we might get the "Hearing Protection Act" passed in 2017, and if we do I'm buying an assortment of legal no-stamp suppressors. Until then I wouldn't roll the dice on this "XL" "comp".
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  4. #14
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    Seems like a dumb idea but try it out and let us know how it works.

  5. #15
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    Quote Originally Posted by SomeOtherGuy View Post
    No.

    FYI:

    "Machined from billet 6061 AL, the KVP XL Linear comp is an excellent light weight, highly functional compensator for your pistol caliber builds!"

    I'm not sure how a pin and weld job works with an aluminum muzzle device. I suppose you can still pin it - but weld it? ATF has some rather detailed requirements about welding or high temp silver solder and I'm not sure you can do either one without damaging the aluminum "comp."

    Also, I have a suspicious feeling that ATF is going to look into this 4" long "linear compensator" and probably frown on it. Remember how ATF forced a recall of dummy suppressors that had no baffles, but were a long open tube with a small hole at the end? This looks similar.

    I'm optimistic that we might get the "Hearing Protection Act" passed in 2017, and if we do I'm buying an assortment of legal no-stamp suppressors. Until then I wouldn't roll the dice on this "XL" "comp".
    If the BATF had a problem with the extra long compensater, they would have sqwaked about it
    INSIDE PLAN OF BOX
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  6. #16
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    Quote Originally Posted by MistWolf View Post
    If the BATF had a problem with the extra long compensater, they would have sqwaked about it
    They don't always say things up front. For starters, you don't have to get a ruling from them before offering a new muzzle device, so they may be learning about it the first on JoeBob's mailing list. Even if the maker did get a ruling from the Firearms Technology Branch, sometimes they change their mind later.

    Also, even if ATF is fine with the comp, how do you permanently attach an aluminum comp to make a legal 16" non-NFA barrel?
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  7. #17
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    "Machined from billet 6061 AL, the KVP XL Linear comp is an excellent light weight, highly functional compensator for your pistol caliber builds!"

    Am I the only one who noticed the aluminum version is for pistol calibers? The rifle version is steel and only 2 1/8" long.

  8. #18
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    I hadn't noticed the XL was only for pistol calibers until you said so. Looks like the description says it's for pistol calibers, but the threadings offered are compatible with typical rifle barrel threads, see below. I suspect this is a case of "we don't recommend you do ___, but we aren't stopping you from doing ___."

    The dedicated rifle version of steel has been around for a while (1-2 years?) and doesn't raise the same issues either on permanent attachment or ATF-deemed legality. It also wouldn't work for OP's goal of a 12.5" barrel made legal at 16+" through the device.

    We designed the KVP XL Linear Comp for pistol caliber carbine, and pistol builds. The extra long length of this comp makes it an extremely functional linear comp, by utilizing a HUGE expansion chamber. In addition to the blast controlling functionality, it allows builders the option to use longer Hand Guards in short barreled pistol caliber rifle and pistol builds. Machined from billet 6061 AL, the KVP XL Linear comp is an excellent light weight, highly functional compensator for your pistol caliber builds!

    NO CRUSH WASHER NEEDED FOR INSTALLATION (Install with crush washer or other timing device if indexing of wrench flats is desired)

    Thread Types: 1/2x28 TPI, 5/8x24 TPI, 1/2x36 TPI, .578x28 TPI
    Overall Length: 4.125 Inches
    OD: 1.4 Inches
    Caliber: Pistol Calibers .45 ACP and Smaller
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  9. #19
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    With a 5.56 rifle the absolute last thing you want threaded to you're muzzle is anything constructed entirely of aluminum.
    A 12.5" barrel with any length muzzle device short of a suppressor is going to have more muzzle blast, flash, and noise than a bare (no muzzle device attached) 14.5-16.1" barrel. Save your money for something that will actually be useful such as a good quality optic, more mags, ammo, ink pens to write your congressperson....jk but seriously aside from cool factor points I cant come up with a single advantage of 12.5" barreled + 4" muzzle device.

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  10. #20
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    Quote Originally Posted by SomeOtherGuy View Post
    They don't always say things up front. For starters, you don't have to get a ruling from them before offering a new muzzle device, so they may be learning about it the first on JoeBob's mailing list. Even if the maker did get a ruling from the Firearms Technology Branch, sometimes they change their mind later.

    Also, even if ATF is fine with the comp, how do you permanently attach an aluminum comp to make a legal 16" non-NFA barrel?
    Not commenting on the aluminum part, just the length. When the BATF had a problem with certain muzzle devices, it wasn't because they were long, it was because the devices reduced the sound signature more than was allowed (which I believe is 2db)
    INSIDE PLAN OF BOX
    1. ROAD-RUNNER LIFTS GLASS OF WATER- PULLING UP MATCH
    2. MATCH SCRATCHES ON MATCH-BOX
    3. MATCH LIGHTS FUSE TO TNT
    4. BOOM!
    5. HA-HA!!

    -WILE E. COYOTE, AUTHOR OF "EVERYTHING I NEEDED TO KNOW IN LIFE, I LEARNED FROM GOLDBERG & MURPHY"

    http://i115.photobucket.com/albums/n289/SgtSongDog/AR%20Carbine/DSC_0114.jpg
    I am American

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