http://i.imgur.com/DFimqmJ.jpg[/img] Yes, I know three ammo types but it strips armor in a hurry. This was actually the match I popped my 1K cherry in something other than a missile boat.
Here's another variation that I like because it's a tad bit better on the heat management side of things.
I have a SHD-H with 2ac5 1ac2 as well as have tried the K2 with the same set up for guns. and i do 1 mouse button on group fire and the other chain. I hit the group fire first and just tap both in whatever rhythm I want. You feel like a A-10 pilot shooting "the gun" with an added cannon going off just for kicks. Also I really get tired of sliding in and out of cover trying to properly unload my alpha. With a variation of this combo you can get a combination of almost every hollywood machine gun happy hero with some success. On the recent first run on my "discount" 4x with single HS and no unlocked anything, I figured I could die from being a slow ****** in the back or at least lead the charge. In open desert I waddled around the side of the hill into about 6 enemies strafed everybody who turned my way and when I started turning red picked out another "phract" and watched him shake and squirm until he blew up. They were down by two when I died and since most of them were picking on me the rest of their team took more of a beating. It does stink that I announced this on chat, and less 1/3 of the team even understood one of the most basic chess moves with a pawn and positioning. Oh well, the point is the damage number may be less than optimal vs other combos, but "suppressive fire" in this build is not an excuse to hide in the back with the LRMs. It is also just fun.
Replace AC5 with UAC5 then ammo management would be better. You can go the other way and replace the UAC5 with AC5 though. Either way ammo would be much easier to manage.