Hi everyone. So I got a new shotgun a few months ago and it's a Brownig Citori 725 trap. I really like the gun a lot and I am shooting very well with it, however I'm noticing I'm getting a lot of cheek slap with the gun and after about 2 rounds it starts to hurt pretty bad. I'm guessing the gun does not fit me properly and that's why this is happening. The gun is a non adjustable stock so I'm thinking i need to get a adjustable stock for it to correct this. This is not something I have done before and I was wondering how would I go about this? Is this something I can purchase for the gun or does the current stock have to be modified? Maybe I'm just holding the gun wrong? Looking for advice. Thanks!