Old A-5 system wasn't gas. It was recoil and if friction rings are set properly, mine rarely (as in NEVER) jammed.
Unsure about the new A-5. They are different animals.
The 3" M2 super 90 is an awesome shotgun. It eats and spits anything from 2 3/4" skeet loads to 3" turkey loads without a hiccup.
