I saw this build in the game and thought I would give it a try. The pilots name was Apachekid so hence the name.
I recreated it the best I could. Im using a screenshot because smurf gets the weight wrong by 2.5 tons.

XL 245 79.3 heat management 1.18
This is my usual chain rattle build.

XL 300, 97.2kph heat management 1.43 (sometimes I drop 1 heatsink for tag or ammo depends on pug or cw, still 1.38)
The comparison.
The Apache Kid build gives up 17.9kph and .5 tons of ammo to greatly increase close range firepower.
I had to adapt a bit to this, I'm used to being able to use my laser while the lrms are on full rip, greatly speeds up the overheat. That really is my only complaint with this build. The speed is still better than a few mediums that are lighter.
Im going to play around with it, so far its done well.