Burris Blemished Products Burris blemished products exhibit minor cosmetic imperfections that originated during the manufacturing process, that will vary from blemished product to product. Blemished products and their included accessories are guaranteed by Burris to operate to the standards of a new product. All Burris blemished products are covered by the Burris Forever Warranty (View Warranty). The FastFire 3 is the best selling red dot sight from Burris. 8 MOA dot. Light and tough, the FastFire 3 series puts an unmistakable, bright red dot on your target to give you an immediate speed and accuracy advantage. Can be used as a primary sight or paired on top of an existing sight. Automatic brightness sensor adjusts brightness to match the environmental conditions; also has 3 manual brightness settings Battery access is conveniently located on the top of the sight; automatic time-out feature after 8 hours helps battery last up to 5 years Available with Picatinny/Weaver mount for mounting on rifles, handguns and tactical shotguns