from personal experience i have had more joy running batocera from a external hard drive with my sinden light gun attached. I have seen a newer option that is plug and play with a set box and two ar light guns.
i feel coin ops now does not work so well with sinden due to the accuracy of the cursor. I have tried teknoparrot but that requires alot of setting up (if you do get it running
it is well worth it)
I did try the pi light gun images but being honest i thought they sucked