I have a Mossberg Shockwave but instead of the birdshead grip I have an SB Tactical SBA3 brace attached to a Mesa Tactical stock adapter on it. I am thinking about putting it back to its original configuration but would like to have a sling on it. Mine is older, so, it doesn't have a sling stud on the grip. I can add one but is there something different that's better that anyone one of you use?