Vortex Crossfire 4-16x50 BDC AoVortex Crossfire 4 16x50 BDC AO Riflescope The Vortex Crossfire 4 16x50 BDC AO riflescope delivers clearer, tougher, and brighter views right out of the box. This scope is the result of a complete redesign that strives to exceed the performance standards of similarly priced riflescopes, bringing you a reliable optic that hunters and shooters can count on in the field. The name says it all: Crossfire is built to perform when you need it most, across