I have an SX2 Light, ( aluminum reciever), functions flawlessly, and I shoot it better than any other gun I own, which chaps my hide because I have an assortment of vintage Parkers, Ithaca's and L C Smith's I wish I shot as well! You won't be disappointed.
PA, I don't own one, but have shot and handled several and love the gun. Was supposed to get one this winter, but ended up with an O/U. Still contemplating the purchase because it fits so well and is lighter than my pump and O/U.