It is Semi Automatic. Totally legal for your momma to own. Only 4,000 made it into the USA. Considered the finest military rifle ever built. Shoots 1/4 MOA. The machining is so precise that the parts all feel like glass on glass. The charging handle is shaped like a little keg of beer, but unlike say, an AK-47, the charging handle does not reciprocate with the bolt. These rifles are well known to go 800,000 rounds without a single broken part.
You can no longer get these since the import ban of 1989 (Fuck you Bush 1), although you can get all the parts except the receiver. So other than the original 4,000 or so here, there will probably never be any more. Most expensive military rifle ever built at what was $4,800 a pop in 1988.
So its a Pre-Ban Assault weapon, which makes it worth quite a bit by itself, I know my PreBan Ak's and SKSs are almost worth twice as much as newer post ban ones. It is Chambered for SWISS 7.5mmx55mm ammo so its not easy ammo to get, either Norma or Wolf is what I use, although I have 2 cases of Swiss military ammo (GP11) coming (960 rounds) that cost me $500.