So I went ahead and purchased the Russian KVP ZPU 14.5mm barrel and I just wanted to make sure I covered my butt before selling. I've read over the shipping restrictions on some of the websites like OOW but can't find anything on DD barrels. Since it has a flash hider I'm going to avoid shipping it to any places with bans on those. Any information or advice would be greatly appreciated! Thank you for all of your help. If you're interested in the barrel feel free to fire off a PM.