U.S. Army snipers will soon see the benefits of a new grid-based reticle for rifle scopes that will improve ... Dot,” which was developed during the Vietnam War for the U.S. Marine Corps.

Marine snipers have been carrying some version of the M40 rifle since the Vietnam ... the new scope is even more exciting than the Mk 13. The new scope comes with the Horus Tremor3 Reticle.

Few Vietnam-era Marines are more storied than legendary sniper Carlos Hathcock ... "The sun glinted off the lens of his scope, I guess," Hathcock says. "I saw the glint and I shot where the ...