Whether you prefer a red or green dot, you have 4 different reticles to choose from with 0-100% brightness adjustments. The integrated mount makes attaching the sight to 20mm picatinny/weaver rails simple. This compact and lightweight sight is ideal for normal and rapid-fire use, featuring a tubeless design and a 33mm reflex lens for a wide field of view. The included allen keys allow you to adjust the windage and elevation to your liking. The durable all-metal construction is weather resistant and shock-proof, allowing for countless years of repeated use. .