The Hybrid is a bad choice for a pistol suppressor anyway, stupid-heavy for that role. By the time you add a piston mount and piston you are pushing 16oz. A full POUND of suppressor hanging off the end of the barrel. Can you do it? Yes. But should you?
I do realize the original KAC Mk23 suppressor was a stupid heavy beast too (15-ish oz), and the B&T version isn't much more svelte at 12.6 oz
I get the reason why is because it is what you have. But it is a compromise design to begin with, and part of the compromise is going to be heavy weight and a diameter too large to use standard sights over the top of it.
And 1.375" cans should work, as that is the current B&T spec for the Mk23 suppressor.