1x30 30mm Tri-rail Red/Green Dot Sight AEG Rifle Scope
[AS652]

yes it will fit on a standard 20mm RIS rail and to add to my other review it is very accurate and good for any purpose i have used it with great success. Pros: it will fit on anything it can be used for anything it has not yet run out of batteries very light weight Cons: ......there is one con and that is that if you are a very negative person you still can't find anything wrong with it.