AR-15 Rifles Video Reviews Ruger SR 556 Review G&A Staff August 10th, 2010 | More From G&A Staff Share0 Tweet Email Share on Facebook.Share on Twitter.Share on Google+Ruger’s Mark Gurney explains the operation and features of Ruger’s piston-driven AR-15. Share on Facebook.Share on Twitter.Share on Google+ Share0 Tweet Email Load Comments ( ) Don’t forget to sign up! Get the Top Stories from Guns & Ammo Delivered to Your Inbox Every Week Even More ar-15 Show More Get the Guns & Ammo Newsletter FREE! Get the top stories delivered right to your inbox every week. 9 Awesomely Creative Ways to Kill ZombiesRead Now! Advertisement ▶ Now on Tablets! Subscribe & Save! Temporary Price Reduction! Subscribe Now Give a Gift | Subscriber Services WAIT!DON'T MISS A SINGLE ISSUE! Get 12 issues for the low price of just $9! Subscribe!