The over-7.5-inches-long Picatinny rail that runs along the rifle, from the end of the top cover to the rear sight leaf, allows for attaching multiple devices at the same time or one device for the maximum eye relief. The SM-13 follows the contour of the rifle closely. The absolute low profile and the relief cut along the rail allow the use of the iron sights even when the scope mount is attached to the rifle.
The SM-13 utilizes the time-proven steel adjustable locking mechanism that allows instantaneous attachment and release of the scope mount without any compromise to the accuracy and loss of zero. Unlike some other mounts that attach to unstable top covers or gas tubes, the SM-13 attaches to the side scope rail of an AK variant rifle, which provides the most stable attaching platform on the rifle.