I've put more than a few rounds through the H&K and the Ruger, both shot very well, functioned perfectly.
I've always liked the idea of a piston gun. But until they become a military standard and parts are standardized, I'm not interested. The reality is, they just make cleaning less of a chore. If that's important to you, then by all means. They can be more reliable in very extreme conditions, but you have to really abuse an AR before you'd notice the difference. Still, more reliability is always welcome. I think the H&K is the best of the bunch, but it's not worth what they want for it. I'd much rather start with a Colt's, buy a good optic, large stack of Lancer magazines, and a weapon light/laser combo, and still have money over for a case or two of ammo.
