This product is backed by iRayUSA's industry-leading 5-Year iRayUSA warranty with a 5-day repair guarantee. During the published 5-year warranty period, iRayUSA will repair or replace, at its discretion, any iRayUSA or InfiRay Outdoor optic that becomes defective from normal use. If they cannot repair an optic in less than one week, they will offer a replacement in like or better condition. InfiRay Outdoor BOLT-C 3.5x50mm 640x480 Thermal Weapon Sight IRAY-TH50C