I need advice. I bought a 20" barrell for my 390, but it has fixed cylinder choke. I want to have a choke system installed. I talked with carlsons and they will install the tru choke system and include 3 chokes but the tru choke turkey choke is .575. Any idea of another gunsmith or company that has a quick turn around and will install factory threads. The Carlson price is hard to beat I'm just unsure about the .575 choke. Does anyone make a tighter choke with the tru choke threads? I also have several chokes for the beretta in my existing 26" barrell. I
