In the modernizing world, the proprietary AK side optic rail is not the way to go to as you would have to mount a separate piece to mount your optic onto the gun, making it more bulky and heavy.
The Asura Dynamics B33 Dust Cover Railis a solid piece of full Picatinny rail made from lightweight aluminium that replaces your original dust cover. Fits AEG and GBB platform AKs. Note AKS74U and Micro aks might not be able to mount this item properly due to the front mounting point replacing the rear sight.
This Dust Cover rail need to install with B30 or B10M Rail.