Get from Amazon : http://www.amazon.com/gp/product/B00K5N0R4Q?tag=wayofcats-20
Tan Holographic Reflex 4 Reticle Red/Green Dot Sight Scope 21mm Rail Mount
Total Length81mm 319
Hight24mm 094
Color TANFits 21mm rail
Scope Dimention36mm x 22mm 141 x 087
The link of black one is httpwwwamazoncomgpproductB00BKFY3A2 :
