first off, what sling do you guys run on your shotguns (if any)? this summer i'd like to take a shotgun course or two, and one of the things being taught is transitioning to a sidearm. i am getting the blue force vickers for my AR15, would this work well on a shotgun? my next question brings us to methods of attachment. i found these online: for the rear attachment i can get a regular loop style, or an H&K snaphook style (i'm doing the snaphook on my AR15) snaphook: loop: for the front, i was thinking something like this: this method will give me attachment at the rear of the receiver and at the rear of the magazine tube. any input from people who know more than me/have taken classes/instruct classes?