What could go wrong with a pitted barrel? Can this adversely affect accuracy, reliability, and durability of the rifle? Where can I buy: 1. surplus 30-round mags? Gunshops I visited are selling locally made mags. 2. replacement milspec barrels 16 inch. The barrels sold by Twin Pines are made in Korea and stainless, priced at P15k. True Weight prices too high.