...at GB...$578...198 of them left...looks like a Clearance...
http://www.gunbroker.com/Item/627055765
The Ruger AR-556 is an M4 style direct impingement modern sporting rifle. It's upper and lower receivers are constructed of 7075-T6 aluminum. The barrel is crafted from cold hammer forged chrome-moly steel with M4 feed ramp cuts. The barrel has a thread pattern of 1/2"-28 and has a twist rate of 1:8 RH. It's mid-length, flat-top design is accompanied with a Ruger Rapid Deploy folding rear sights, a milled F-height gas block and a post front sight. A forward assist, dust cover and brass deflector come standard. The stock is a telescoping black synthetic six-position design. This model features an improved trigger-reach grip and an enlarged trigger guard. It sports a hard coated anodized finish for extreme durability and corrosion resistance.
Specs:
•Includes one 30 rnd. Magpul® PMag®
•Overall Length: 32.25''-35.50''
•Wt.: 6.50 lbs.
•Caliber: 5.56 NATO
•Capacity: 30
•Barrel Length: 16.10"