bolt carrier group

Hey, All! New to the forum...finally found a place that should be able to give me a definitive answer for this rifle I am researching! I don't know the caliber, and I believe my Dad has the bolt (but we really don't talk anymore). I bought this from a friend, at least 25 years ago as a youth...

I have had an FS2000 on my mind and with recent events I decided to purchase one and a couple other FNH arms as it looked like they might become rare to unatainable. I thought I read a lot on this forum which is my go to place for FN stuff, of course. Some how I missed the information the 9,000...