Not sure this will give you a short enough LOP.That’s what I was thinking too. Just about an inch. I tried searching for a thinner pad but couldn’t find one. I’ll look further to see if anyone makes one.
Picked up a Mossberg 590 yesterday. First pump shotgun. Overall I love it but the length of pull is about an inch too long for me. Best way to shorten it?
Depending on your 'style', you might also look at some tactical stocks which are adjustable. The 590 is a great gun and can be customized in many different ways --- the rabbit hole is your friend!