the great thing about the aimpoint is that the scope can be left on for about 5 years without the battery going dead.
and it can be mounted in standard 30mm rings.
and it gives 2X magnification. AIMPOINT® 9000L
Whether you are hunting deer, moose or bear, this full-length sight delivers unmatched performance and reliability. Primarily designed for rifles with standard or magnum-length actions, the 9000L can handle the most extreme hunting conditions. Like all Aimpoint® sights, the 9000L is built to handle heavy recoil and is the favorite of big game, rifle hunters around the world.
Ideal for big game and sport-shooting rifles with standard or magnum-length action and semi-automatic rifles
2-ring configuration fits nearly all 30mm-ring mounting systems
New technology called ACET allows 50,000 hours of operation on one battery (there are 51,264 hours in 6 years)
Available in 2 dot sizes (2 and 4 MOA)
Submersible to 15 feet (5 meters)
Also available with 2X power fixed-attachment