ncstar 3-9 with Bullet Drop compensator for 5.56mm. It works great I just have decided to go with an Eotech for fast acquisition. I bought for almost $90 I am selling it for $70.
here a hyper link to it.www.sportsmansguide.com/cb/cb.asp?a=236326
Stealth accuracy vastly improved! NEW NcSTAR® 3-9x42 mm Illuminated Rubber Armor Scope.