Aimfiree QD Quick Release Mount Adapter 4 Slots Riser Scope Mount Fit 20mm Picatinny Weaver Rail 4-Slot QD lever lock adaptor and riser for red dots, scopes, and optics. Fit any 20mm picatinny weaver. Easy to install and detach, no tools needed. Ajustible locking tension. Immediate conversion of any non-QD mount accessories to QD deployment.