Ares Armor EFFIN-A Compensator MKII

Ares Armor have updated their EFFIN-A compensator (the name always makes me chuckle). They have slimmed it down, knocking off half its weight, by reducing the number of ports, from 28 to 21, and removing the ability to stack multiple EFFIN-As in a row  Each of the ports can be blocked with a screw so that the user can tune the compensator for their rifle. It is retailing for $89.99.

EFFIN_A_MKII__94238.1372263601.1280.1280

EFFIN_A_5.56_MKII__17452.1372263798.1280.1280



Steve Johnson

Founder and Dictator-In-Chief of TFB. A passionate gun owner, a shooting enthusiast and totally tacti-uncool. Favorite first date location: any gun range. Steve can be contacted here.


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  • John Daniels

    The ability to stack multiple compensators was half the draw of the original, but this looks interesting as well. Probably a whole lot simpler to make, too.

  • Vermin.308Winchester

    The Canadians will have this on a tavor within the year and it will be the most weirdly Canadian thing ever

    • Raoul O’Shaugnessy

      Except, of course, for the Ross rifle.

  • Esh325

    I’d really like to see how these comps work on fully automatic. The original M16/M4 isn’t known to be that great with fully automatic fire (like many assault rifles). I wonder if a really good muzzle brake could significantly reduce shot dispersion in automatic?

  • Cobalt-60

    Looks like a modernized copy of the German FG42 muzzle break of WW2.

  • Ian

    And it’s still screwed up because it’s not symmetric.

    • Rgun

      Looks symmetric to me.

      • Ian

        Bottom row isn’t ported.

  • Geoff H.

    Sounds like they got a cease and desist letter from BATFE. These guys are a local company and I know one of the guys that helped design the original. Screwing more than 2 together gave it some interesting characteristics.