After selling my last 870, a Police model with ghost ring sights, I've decided I need another HD 12GA. I'm going to get either an 870 or a 590A1, probably an 870 since I know them so well. Whatever I get, I'm considering a Mesa AR stock adapter, with an Endine recoil reducer. Has anybody used one of them? How did it work? I also plan on a Surefire forend and a Mesa Sidesaddle. The gun will be used for HD, camp protection, and will be in a police shotgun rack in my truck much of the time.