NcSTAR SFB3940R 3-9×40 Black Scope w/ Ruby Lens and Rings mazon offers the NcSTAR SFB3940R 3-9×40 Black Scope w/ Ruby Lens and Rings with free shipping. This is an impressive entry-level scope for the money, and fits all Weaver/Picatinny tactical rails systems. Ideal for mid-range AR-15 and AK rifles, the NcSTAR SFB3940R 3-9×40 scope allows …