Burris Refurbished Products Burris refurbished products have been returned to Burris by a customer, and may exhibit minor cosmetic blemishes from usage that will vary from refurbished product to product. Refurbished products and their included accessories have been restored to a guaranteed operational standard for a new product by Burris. All Burris refurbished 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