Nikon P-308 Matte BDC 800 Rifle Scopes, 4-16X42mm 30mm main body tube offers additional windage and elevation adjustment range (90 MOA) Built specifically for rifles Chambered for the 308 Winchester round, Nikon p-308 riflescopes integrate reticle Technology developed for long range shooting with this cartridge Multiple layers of anti-reflective compounds on every Glass surface provide bright, vivid sight pictures and optimum light transmission from dawn to dusk