American Tactical Imports are bringing in a new .22 chambered AR-15. The Varmint Killer VK-22 is made by Chiappa Firearms and features an AR-15 lower receiver and a dedicated .22 LR A3-style upper. The lower can be used with any AR-15 upper.
It ships with either a 10 round or 28 round magazine.
The MSRP is just $499.95. I think this looks like a bargain.