NATO rail clamp (spring loaded)

NATO rail clamp - spring loaded!   Hardware required: 1x M3x35mm socket head screw 2x 304 stainless steel spring (0.4 x 4 x 30mm) Assembly:   Perfect in combination with my NATO rails!   Following the official STANAG 4694 specification.  Fully compatible with the picatinny rail (MIL-STD-1913) standard.   I had a lot of those specific springs laying around because they are the same used in the mechanism mount.   Multiple iterations led to the final design: