I have a couple of 10/10 AIA's. Lots of fun. Though.. I noticed last time I was shooting with them, that I had the problem where if you remove the mag, the bolt slams home. It's not catching on the bolt stop. I haven't looked to see whether this is a problem with the mag, or whether it's a problem with my bolt stop.
Either way it's a lot of fun shooting the 10/10's and if anyone has more of them, I will happily buy them
Actually the reason why I want to buy 5/10's is to use them for spare parts to repair the AIA's if they ever break. Unless it's the case itself that breaks, I think the spring inside is identical, for example. The follower... is almost identical... the AIA follower is made of slightly different material and is a different colour than my norc follower, though it looks to be the identical size/shape. I would be a bit leery swapping that as I'm not sure at what point the magazine would become a Norc magazine and therefore prohibited. I assume primarily it's about the casing, but I don't know how far I'd want to push that.