AGM Global Vision makes the Taipan, Rattler and Varmint thermal lines. This focus ring extension isn't an AGM part. It's made by Dark Night Outdoors for the Taipan 19 and 25, and DNO-branded products carry our lifetime warranty against defects in normal use.
It does. A thermal monocular reads heat, not light, so the Taipan 19 or 25 shows warm animals in full sun as well as at night. Daytime contrast can drop when the sun warms rocks and ground, so you may refocus more often, and the bigger grip on this focus ring extension makes that quicker.
Thermal can't see through glass, shows less fine detail than a day scope, and the picture softens when you swing between near and far without refocusing. That last one is what this extension helps with. It gives the Taipan 19 and 25 focus ring a larger grip, so you can adjust it in gloves while you scan.