Looks like an abolt 1. Note the bolt with the straight grooves. Can’t tell for sure. Need a pic of the bolt in the action.
I think you’re right. I was looking at the final picture which looked like the shroud of the 2, but the previous picture looks like the round fluted bolt of the 1. The BBR had a similar/same bolt.
Either way, to FastXD, the 1 and the 2 are nearly identical, and much better than the 3. Should be a good shooter. These are hard rifles to source upgrades for, although numrich usually has replacement parts if something breaks.