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theyre around like 54 bucks shipped on botach

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Can you find some data on what size the ports are?

I think they are too small to be effective. It will work. 

I like to make my brakes with large primary ports.

I got 2 incoming in a day or two.  Will try to get out and shoot it asap.

First impressions:  Looks to be the same size ports as a regular MB556.  The MB556 works fine so this should as well.  I can see where they cut back on costs, comes in a cardboard box, crush washer, and simple instructions.  Looks like they're planning to release a flash hider along with this.  3P Eliminator Flash Hider. The finish is a little rough with tool marks, and really shallow name engraving for PROCOMP and Surefire.  It is a pure basic form of the MB556, which is what I expected to get for $52 street for these.

In comparison to other brakes it is relatively the same size as the MB556's.  I threw in a Battlecomp BABC to show size relation compared to a Battlecomp 1.0.  Left to right - Spikes Dynacomp, Fortis RED, Rainier Arms XTC, Battlecomp 1.0, Surefire MB556K, Surefire Procomp, and Battlecomp BABC.  I'll be taking it out for some shooting and comparing to a regular MB556, and a Battlecomp 2.0.

Does it come pre-drilled for the pin and weld?  Also, what size wrench and what portion of the brake would you use to tighten it?

3/4" wrench.  The brake is designed with wrench flats near right before the ports, near the top circle vents.  They're not pre-drilled for pinning, probably to save some costs on their end.  It's a pretty long brake so I assume they can be used for a 14.5 barrel.  The material used isn't the toughest...I left some marring on the finish when I installed it.  It was unavoidable, it wasn't due to my mistake, the metal is just a little soft.

Mahalos for the info.  I guess I will stick with the original MB556K's I have sitting on the shelf.

Ran it a couple of days ago, shoots almost identical to the MB556 (as expected).  For the price, it is definitely hard to beat. Right now I have a mix of SFs, and battlecomps and I'll probably stick to them.  I still prefer the look of the MB556s but I think that the procomp it is a good option.  The price is better than most brakes out there and functions as good as or better than a vast majority of devices out there.

What about the Lantac Dragon?  This guy is firing on full auto and the muzzle barely moves: