Nightforce rings - NightForce Standard Duty Rifle Scope Ring Set, 30mm

easily mounted, durable and lightweight. I would recommend this type of ring for any picatinny rail, once mounted there was no play between the rings and the rail. ordered two sets mounted on my .223 Olympic arms and 5.56 BCM easily cleared the forearm assembly and fixed front sight post. Used with the vortex viper 6.5x20x50 scope.