The Mossberg 500 All Purpose Field 20 Gauge Shotgun features a 3-inch chamber and quiet-carry, dual-action bars. The walnut stock is fixed at a 13.88-inch LOP and the ported barrel has a blued finish. Standard trigger. Dual bead sights. Ambidextrous safety. The moss berg for sale is is a preowned, preferred shotgun. its blueing is 90% a few slide marks and one spot of pitting. over all a great gun for the price.