I have a pistol grip Mossberg 12 gauge. It kicks like a mule. But with a 16” barrel, it can be carried in my truck without a cc permit.
I tried putting a pistol grip with no butt stock on my Winchester Defender. The recoil was bad enough that I replaced it with a full stock but still with pistol grip which is much easier for me to hold due to arthritis in my hands.
I can see the utility of the short barrel, pistol grip only but it is not my cup of tea.
I always understood that 18 inches was the minimum for a shotgun. Are you sure yours is only 16 inches?