Oh if only it were the pro Glock lower....
The BT APC9 Pro is a B&T US product and Canada does not have access to it. (info source Wolvorine Supplies)
Yeah, I think it's waiting on lab approval (total BS.)
Only negative about the glock mags on the B&T variants is the angled look, OEM mags have a straight up and down look which I find more appealing to the eye.
This can only be made compatible by purchasing new Glock semi lower for APC9 and also having B&T machine the original APC9 bolt in certain way to make it function with both B&T and Glock lowers. This service is offered by B&T USA south of the border, but I do not know of anyone who can do this in Canada.