A very afforable  Axeon Trisyclon Dot Sight Scope from Elite Force can now be ordered from Airsoft Atlanta... "Awesomely designed Axeon sight illuminates Red / Green / Blue dot reticle for fast target acquisition. Fits on all standard top rail receivers. Looks great on the M4 platform. If you're unsure of what type of red dot sight to get for your airsoft gun, this is a sure bet of something that will make all airsoft players happy. A solidly built and easy to use sight!

Includes batteries - 1x30mm scope. 5 MOA dot size. 4.25 inches long."