Anyone have any preference on a tactical mount for AR15 to mount on a wall?

They do make some cool wall mounts--but I don't have one. I keep most everything in the safe. Except, one is generally propped up in a corner just in case I see a hog, etc.

https://arma15.com/

Works very well at home and in vehicles.
Problem with keeping them in a safe is they become slow to access.

Yep, safes are slow.

adjustable 2 point sling like a magpul MS1 , the rapid adjust slider with no hardware to make noise and a sturdy coat hook on the wall

gets it off the floor , keeps the sling strait and easy to slip on , very simple

it offers quick , but zero security

easy to put all over the place , not expensive , and when the gun isn't hanging there it's just a sturdy coat hook , hang a jacket on it

Actually thinking of that in the closet. I don't need security.