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Thread: SBRs and muzzle blast

  1. #1
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    SBRs and muzzle blast

    What is muzzle blast like firing 5.56 through sub-14.5" barrels? I just discovered that AR pistols are a possibility in CA (SBRs are definitely not allowed); I was wondering how unpleasant they are to shoot. In the Vietnam era, the 10.5s had that long sound moderator attached, which made them practically 14.5s, but with the Mk18s this does not seem to be an issue. What are your impressions?
    "The secret to happiness is freedom, and the secret to freedom is courage." - Thucydides, c. 410 BC

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    Muzzle blast? It's there, alright. Still lots of hot expanding gasses in play at so little distance from the chamber.

    Just put a nifty little Cali-legal and very effective BattleComp on there!
    --Josh H.
    Zombies seek out and eat brains. Don't worry; you'll be safe if they attack.

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    muzzle device is the key, if you're concerned about blast from shorties. the muzzle device makes all the difference. you'll need to be careful about selecting one that's california legal, obviously. the problem with california-legal compensators is that compensators/brakes often tend to be the blastier devices.

    check out the battle-comp... www.battlecomp.com.. it's cali legal, made in cali, and is an excellent comp, but brings flash and blast down to very similar to an A2 (which is not cali-legal, for stupid reason).

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    My 10.5" w/ AAC Blackout is no issue even indoors w/ the lights off (can see the flash, but it is very dim and not distracting)...don't know about the brakes. That battlecomp is probably your best bet, if it is about like an A2, that will help.
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    Quote Originally Posted by bkb0000 View Post
    muzzle device is the key, if you're concerned about blast from shorties. the muzzle device makes all the difference. you'll need to be careful about selecting one that's california legal, obviously. the problem with california-legal compensators is that compensators/brakes often tend to be the blastier devices.

    check out the battle-comp... www.battlecomp.com.. it's cali legal, made in cali, and is an excellent comp, but brings flash and blast down to very similar to an A2 (which is not cali-legal, for stupid reason).
    Flash hiders are legal on pistols, you need a mag lock because the mag is outside of the grip. They are illegal on drop free mag rifles because they need to be "featureless".

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    The blast is more severe than a 16", but nothing to make one scared or distracted. Plenty of people shoot 10.5's and 11.5's. I do and love the shortened length. When on the line in a class, it may give pause to those next to you, but they soon realize it's no biggie. The benefits far, far outweigh the blast.

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    I fired my 11.5 with my muffs up on my head (above my hears on accident), and I thought the gun Kaboomed!!

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    Quote Originally Posted by markm View Post
    I fired my 11.5 with my muffs up on my head (above my hears on accident), and I thought the gun Kaboomed!!
    i left mines sittin on a table 30 feet behind me and let one rip from a tenfive a few weeks ago. i thought i'd torn a rend in the fabric of spacetime.

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    I shot about 200 rounds through my 11.5" SBR last weekend and forgot my muffs, so I used earplugs. I had a definite ringing and music sounded strange for about an hour after. I will definitely not forget my muffs from now on, and would hate to shoot it indoors without ear pro.

    That being said, I've never shot any other ARs with plugs alone, so I don't know the difference.

  10. #10
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    What plugs are you using? Decent plugs are much quieter than most ear muffs. The KEY is getting them into your ears correctly.

    My problem is that those orange mushy plugs work TOO GOOD. I can't hear anyone else around me when I have them in.

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