ATN Day/Night weapon systems, for those who are looking for the best day/night vision rifle scopes. The Day/Night weapon sight is ideal rifle scope for Hunter, Military Marksman and Law Enforcement sniper.ATN 4-12x80 DN was successfully deployed in War on Terror, both in Iraq and Afghanistan. The latest advancement in Night Vision optics – the ATN PS22 gives your daytime tactical scope or spotting scope Night Vision capability in a matter of seconds. The ATN PS-22 mounts in front of a daytime scope to provide it with night time operation. No shift of impact, no need to re-zero or change in eye relief occurs.