Nikon is currently running a Promotion on their M-223 line of scopes, buy a M-223 scope from a PARTICIPATING DEALER and get a free M-223 AR Mount at the time of purchase. That'll save you about $99.
This goes on till the end of May.
Act fast, quanities are limited!
For a participating dealer check outhttp://www.nikonpromo.com/m223.html