IDK much about suppressors. My goal is to build an extremely compact SBR for close-quarters indoor fighting (ie home defense) without ear pro. I don't expect it to be hearing safe, hopefully just "hearing survivable" (I would practice with ear pro). 5.56 vs 300 blk is also a question I'm considering. And I think I need to stick to supersonic for effectiveness, but if I'm mistaken please correct me. How would a 7.5" 5.56 barrel with a very short can like the Mini4 (or similar) perform with supersonics? Would it destroy the can? Would 300 blk be better? Other ideas? Thanks, y'all.