ok Swiss chads. I saw a deal I couldn't ignore and now have a K31 en-route. I never had a swiss gun before so I need a quick rundown on ammo, clips/magazines and bayonet/other accessories.

It seems that the GP11 ammo is harder to come buy these days. Are any of the alternatives decent?
Cardboard clips? From what I have seen posted, hey hold up well but originals are expensive. Any repros good? I heard GP11 bricks come with some clips, is this true?
Anything to look out for when buying a bayonet?

tldr; what do I need to have fun with the swiss shootenheimer?