<B>Vortex Optics Viper HS 6-24x50 Rifle Scope with Dead-Hold BDC Reticle (MOA) - VHS-4319 Review</b><P>http://tinyurl.com/ng69dya <P><P> Vortex Optics Viper HS 6-24x50 Rifle Scope with Dead-Hold BDC Reticle (MOA) - VHS-4319 <P>30MM Main Tube<P>Second Focal Plane<P>Waterproof and Fog proof<P>