Athlon Optics, Talos BTR, Riflescope, 4-14 x 44 First Focal Plane (FFP) 30mm Tube, Illuminated APLR2 MIL Reticle First focal plane reticle stays valid at all power settings allowing you to fully utilize the Specially designed reticle that shrinks or grows along with your target as you zoom in or out Reticle etched on the Glass that provides excellent backing support for complex reticle design and offers great durability and much higher shock resistance to Recoil The illuminated reticle provides greater visibility during dusk and dawn and other low ambient light environment Heat treated one piece tube gives the scope extra strength over multi-piece tubes. A one piece tube also is better at keeping moisture out thus keeping your scope fog proof for the life of the product Nitrogen purging dramatically reduces the moisture inside the tube and helps maintaining Fog proof and waterproof