GSCI’s Clip-On Thermal Weapon Sights CTS-275-64 are designed for medium-range engagements. Utilizing the quick release weapon mount, the CTS-275-64 easily attaches to and detaches from standard 1913 Picatinny rails in front of daytime scopes. This gives the operator the ability to deploy it on multiple weapon platforms without the need to dedicate a thermal scope. CTS-275-64 sights have built-in digital collimator which allows the easy pairing with the host day scope.