I posted this on the shotgun shooting as well.
I've got 2 used BPS's.
One made in 1987 with just a fixed choke.
The other was made in 1984 but came with choke tubes and has a selector on the mag tube so I can empty the chamber without emptying the magazine tube.
Am I safe to presume that the barrels are not original?
When did Browning start using choke tubes?
Thanks.