Neither rifle he posted was a piston gun, they are both DI(direct impingement) rifles. That said, BCM, Colt, an Aimpoint, and a class, and there may be leftovers for ammo with a 2K budget?From what I know those are great guns but they are boutique rifles and the salesman is trying to make money off of you. Personally I don't like piston guns because there seems to be no standard and every company does their own thing. Go with bcm or Daniel defense If you want a top notch rifle and spend the rest on ammo mags and optics.