Put me in the maybe column. I need to learn more about the 6.5G to decide if it's right for me.
1Are the only non-5.56 parts the barrel, bolt, and magazine??
2Can a different follower be added to a 5.56 magazine to function in 6.5G??
3What bullet weights are ideal for this twist rate??
4Is the barrel dimpled for a gas block?
I highly recommend threading. It's much easier to get it now and cover it with a thread protector. You will want to suppress it.
1. Yes.
2. No. You can stuff 6.5G rounds in a 5.56 mag; but it's not usually reliable.
3. All available ammo (90-130gr.) seems to work well. Around 120gr. seems to be ideal; but not always.
4. I don't think so; but I'm not 100% positive on that.