You have neither
The Xbox has 4 holes for each side of the receiver bridge for scope mounting
The a bolt has the usual 2
The bbr is a different rifle altogether
A-Bolt is a damn good rifle, and despite the lack of aftermarket support, the actions are really nice to build a custom off of. 3-lug 60° bolt & super smooth…
The BBR was the precursor to the A-Bolt and is a very different action to the A-(or X)bolt. At the time, the BBR was made in Japan by Miroku for Browning and was quite similar in appearance and features to a Weatherby Mark V. Similar enough that Browning ceased production and came out with the A-Bolt.
The most visually obvious difference is the 9 lug bolt of the BBR. Simply removing the bolt from the receiver will inform you which action you have.
If you have pictures of your rifle I'd be happy to see them, I've long liked these rifles and think them under-appreciated.