Better than anticipated.

By: Diomed on 08/04/2015 10:21:54 AM

I caught this on sale a couple weeks ago and it was too good to pass up. I took a guess on which ports to close and by some miracle the muzzle barely moved! I love when I guess correctly. I can probably tune it a bit more, and will, but for now it's amazing. My buddy was so impressed it's now on his list of must haves. I honestly expected about half of the performance. The lack muzzle rise almost takes some getting used to. I highly recommend this to anyone, fresh build or just as an improvement for your present rifle. It does exactly what they say and that's a rare thing in today's world.

Effin AWESOME

By: qwestr1 on 03/20/2014 10:43:21 AM

While gathering parts and talking to AR-junkies in preparation for my first build, I came across the Effin-A. I immediately understood the concept, and liked it because I'm one of those guys who likes to fiddle with stuff and fine-tune things. I got my MKII after the build was finished, and had fired my AR without a muzzle break or flash hider at all. I had noticed it tended to climb a bit and go to the right, and there was a good amount of flash. I installed the Effin-A (I had already filled the bottom ports, I knew I didn't want a faceful of dirt) and fired a three round group. WOW, what a difference! Of course it was loud as hell, but that muzzle SLAMMED down instead of rising like before! After closing a couple ports on the top and one on the right to fix the angle of recoil, it has a tendency to dip slightly, but returns almost perfectly to target. I was so impressed, I told all of my AR buddies about it. I even sought out one of the older MKI versions and will try it on a future build.

Effin-A

By: Eric on 02/07/2013 01:27:20 AM

I grabbed an "effin-a" comp because I was really curious. I fired my new build for the first time tonight. I was more concentrating on weapon function but was doing a little comp tuning too. The difference between the wide open ports and tuned ports was crazy. After shooting with it with all of the ports open, and seeing no difference, I started by sealing the bottom and leaving the top three rows wide open to compensate for rise. Holy mother, the rifle was slamming itself down, and considerably so. I was amazed at the difference the ports were making. That being said, I've never shot anything but A2 birdcages before tonight. I made a few adjustments and it leveled off considerably, but I have more work to do. With some more fine tuning this thing will be rock solid. This I will tell you, comps make a difference. Keep this in mind... I've never seen flames from an A2 bircage muzzle device. EVER. In my well lit indoor range, I was seeing balls of fire with this effin-a. If hiding from your opfor at night is your goal, skip the effin-a.