Thanks, Don. It is roll stamped 'Trap' immediately forward of the triggerplate screw.
As for switching out forends (only for the present), I've just always liked the feeling of being more connected to the barrels themselves with my pointing hand when shooting SxS's. The kidney pattern forend is appreciably wider and deeper than the slimmer beavertail, although my photo doesn't show this all that well from the underside. I'd prolly be just as happy with a splinter forend on this gun actually, as a personal preference.
I've had the pleasure of shooting a friend's M21 in 16ga. with a beavertail as yours, and to me, it feels a lot less cumbersome than it does in a twelve.
Robert
