No...old gas system. Purchased in May of '07. Like post states...barely shot, about half way through the 300 round break-in. It's been a fantastic rifle for what little I've shot it, just need the $$$ for another rifle project right now. I'll certainly buy another XCR down the road...I'm about to start a new job with a Class-3 dealer, and will probably order a factory direct SBR when the times comes.