Using the A-`10C II and both SSA Beta 2.1.2.0 and Stable 2.1.0.0, neither has any gun vibe. Going from 0-100, checking and unchecking the box gives no effect. Seems as though everything else is working, just not the gun. It used to work, now doesn't in the last couple days.
BTW, the drop down only shows the A-10C, not sure if it should show the A-10C II as well.
IRL, that GAU-8 will shake your fillings loose.
Cobb