What is a Picatinny plank (Picatinny)? And how does it differ from the weaver rails?
Picatinny Planck – A term that appeared in the arms industry due to the military standard MIL-STD-1913, adopted in 1995. The title of this document is “The dimension of the rack for attaching accessories for light weapons”, and it contains dimensions and tolerances for fastening systems.
The name itself “Picatinny“Comes from the place of” birth “of the system, arsenal Picatinny in new jersey. MIL-STD-1913 sets the required parameters, including length, width, height, angles, and tolerances. The most important is the specification of the profile and the recoil groove.
MIL-STD-1913 Profile Specifications
Profile – Reiki cross-section. The recoil groove is a slot in the rail that prevents the hinge from moving along the longitudinal axis of the weapon.
What is the difference between picatinny and weaver designs?
The profiles of both are almost identical. The key difference is in the position of the groove and its width. Grooves according to MIL-STD-1913 (picatinny) 0.206 inches wide, and the distance from center to center is 0.394 inches. System Weaver provides a groove width of 0.180 inches and not always a constant distance from the center to the center.
MIL-STD-1913 Recoil Groove Specifications
In most cases, the use of strips weaver very specific, so the lack of mutual compatibility is not a problem. Same system picatinny must comply with the above parameter to be standard and to satisfy uniformity, ensuring compatibility.
What does this mean in the end?
It all boils down to the fact that the linkage with the mount weaver in most cases, will rise to the bar picatinny, but not the other way around.
For those interested – below itself MIL-STD-1913 in PDF format