I’m ready to jump into the NFA pool. This will be my first can and it will mainly be used on my AP5 mp5 clone. I’ve been doing a little research and I’ve heard good things about the Rugged Obsidian 9, Omega 9k, and YHM R9. I think I’ve settled in the YHM R9, the cost and i like the fact that I can’t shoot 5.56 on a 16” also. Are there any other cans I’m missing? Any recommendations on shops where I can buy? All feedback is welcome as this is my first NFA purchase.