Tuning Digital gauge for Benjamin bulldog?

Hello,

I am considering getting a digital gauge for my regulated Benjamin bulldog.

I see from some websites the Benjamin marauder has the same gauge as the Benjamin bulldog, and they look the same, but on other sites it seems that there might have been a change of some sort after February 2020, at least for the marauder. 

Also, there is some indication on some other analog products that the marauder might be 1/8 NPT.

However, I am not sure, and also do not know the threads.

Is it 1/8 NPT, 1/8 BSPP, M10*1.0, or something else altogether for a new benjamin bulldog? 


Thanks in advance for your help.