I got the inspiration for this build from this thread on Reddit. The build on Reddit has a few differences, notably the gauss instead of LBX. I quite like the LBX + PPC in the shoulder though, rather than the lower mounted Gauss in the arm. I also haven't mastered the new Gauss firing mechanism yet or really tried, so LBX it is! I really like this build, best effort so far is about 970dmg, great fun!
I was a bit dubious about this combination at first, but having played it I've gotta say it is pretty effective. It doesn't do any one thing exceptionally well, but it gives you good options in a range of situations.