These Burris XTR Xtreme Tactical Single Ring Aluminum Matte are high-quality rings known for reliability. The simple and proven design of these rings along with quality aluminum construction make them sturdy enough to mount a variety of optics accessories. These Burris XTR Xtreme Tactical Single Ring Aluminum Matte are made for the tactical shooter who values lightweight mounts with good holding power. They will work with everything from smaller carbines to magnums and are also ideal for hunting rifles and muzzleloaders.