In 1965, the U.S. Marine Corps began its search for a new rifle and scope combo to serve as their official combat sniper rifle. The goal was to have USMC armorers customize and accurize a readily available production rifle. The Corps settled on the Remington Model 40x, chambered for the .308 Winchester (a.k.a. 7.62 NATO) cartridge, and topped it with a commercially available 3-9x40mm hunting scope with an Accu-Ranging scale. The rifle was designated the M40. Hi-Lux Optics is now recreating this 1960s era scope for all of those old school sharpshooters among us, those who take the time to know the trajectory of the loads they shoot. However, weve made major internal improvements. The optics are far superior to that of the original, with precision ground lenses that are fully multi-coated for maximum light transmission. Weve also added positive 1/4 click adjustments to the windage and elevation turrets.