Anyone use them? Looking at doing their 5 inch kit with the hybrid cones. Question would be is it best for 9mm or 300 blackout? Just want to get some ideas together before I file my form 1. I have a yhm turbo k and a yhm r9. I’m alright with making it a 300 blackout can or a 9mm. Another question is it possible to add an longer ti tube to the end similar to a module suppressor?(obviously would have to make it longer on the form 1)

5" isn't going to be anything to write home about, but the extension module would be a plus (yes, it's legal to do). A 9mm design can work for 300blk subs as well. The larger OD tubes (1-5/8) will be best.