I'm not a fan of bio-BBs. As far as I know, they don't make 0.36g bios, and that's what all of my sniper rifles eat.*
If I can find some decent 0.25g's, I might come out eventually to do a test run on my GBBRs. It's been a while since the SCAR has seen any use, and I haven't even gotten to try the G&P out yet.
For the record, the main thing keeping me away is the BBs. If I can find the weights I need, I'll be glad to play any time.