What is the cheapest semi-automatic 7.62x51 rifle with a QD magazine that is suitable for combat? I've looked into the Springfield M1A(M14) but the price ($1500) is just too much. I've also looked at the AR-10 (and Panther Arms version) since I'm very familiar with the M-16, but it's similarly pricey. I have a nice SKS already but I really want something in 7.62 NATO with an external magazine.