Is the Sig Sauer Echo CV25 the best thermal to date? 4MR Ranch put out this video to go over this thermal clip on. This features BDX 2.0 and a quick disconnect mount, offers adaptable performance in any situation. Its compact 5-inch design includes a parallax-free eyepiece for rapid target acquisition and easy firearm swapping. Powered by a high-sensitivity 640x512 thermal core, it captures photos and videos with audio, configurable via the BDX app.