No, it's not an AR-10. The AR-10 does take different magazines. "AR-10" is the trade-name of ArmaLite. Several other companies, like DPMS, make a short-action rifle like the AR-10, but they are not the same.
Price wise, I would go with a Rock River NM two-stage. If you want a better trigger, get a Rock River that has been tuned, or get a Jewell.