Looks like fun. I would probably trim some armor for more speed and ammo. Careful with the 1/2 ton ammo. You only get 2 shots instead of 5 per a whole ton.
5/5, 1st game with this build, I already had maxed skills. I even fitted the warhorn that most resembles the anime intro. TL;DR very situational, but fun and efficient as hell. Absolutely nuts at close range despite being very hot, so you should not fail to focus a component and be too confident you can take multiple enemies without coolshots I was thinking to rate it 4 stars because it quickly loses any potential above 250 meters and it's very slow, but the 2xHGR can still deal good pinpoint damage at 500 meters and the huge pin point damage is truly amazing. 4.5 would be my actual rating: a very unique ("snowflake"?) build, but too hot and slow without skills and coolshots and for this reason very situational, as stated earlier. If you can ambush or manage to brawl enemies one at a time, it's a death machine. Play this build anyhow different than that and unfortunately it's not great.