Awesome fins for your Gun !
The best big wave fins I ever had. For years was using standard high-performance quad fins (usually downsized from standard L to M - I am 80kg) but these things are next level. They hold at high speed but are also loose enough for turns. Using them on my 8'0" Pyzel Padillac and looking forward to try them on my 7'0" step-up as well (on a large enough day).
Note: All four fins are the same size - which looks weird at first, but obviously that's what you need in grunty swell.