The Aimpoint 12841 Sight has a rugged design, with aluminum alloy housing, making it highly durable. Its lens opening is recessed, preventing it from scratches, fingerprints, and any other damage that may occur due to an external impact. With a battery life that can run up to three years, this sight eliminates the need to change batteries constantly. In addition, this sight is water resistant, and compatible with night vision devices of every generation.