I have run German,and Paki milsurp without a hitch.RRA Standard Operator.Call RR like brother Tom suggested.I have run used Fal mags that I repaced the springs in from Wolff.Recently had a bro makeup some rounds that ejected but on the followup shot BCG went rearward enough to reset trigger but just went click.Haveing to pull back CH which turned rifle into a single shot.Followed with factory didn't miss a beat.Sold them on the job to a bro with a Ruger Scout.The only thing was right out the box brass had a noticeable scuff from extractor which after 700 or so rounds has decreased and was different relative to case from ammo used.