Fits full Size Glock® MOS Pistols
G17/G19/G26/G34/G40/G41/etc. MOS Pistols
It comes down to the sensor and lens. More pixels and a longer lens let you detect heat farther out, while weather and humidity cut range. A compact pistol-mounted thermal is built for close work, and big rifle scopes are built for long fields.
Thermal sights cost more than red dots because the sensor and germanium lens are expensive to make, and price climbs with resolution. The plate is a small add-on by comparison. Prices for each Infitac sight and mount are listed on their pages, with fast shipping and no credit card fees.