BS-150 AK side mount kit, P1 Picatinny configuration

Quick-detach side mount for Kalashnikov-based firearms, consisting of a lower module and an interchangeable upper module. The lower module attaches directly to the receiver side rail. Its upper mounting points accept interchangeable upper modules with adjustable fore/aft positioning to set eye relief. The steel clamping tooth provides secure attachment even on heavily worn side rails. The included upper module has a 12-slot MIL-STD-1913 rail for optics with Picatinny mounts. The upper module allows horizontal adjustment to align the sight with the iron sights and barrel axis. This is useful because AK variants and civilian derivatives have side rails with different offsets from the receiver.