Nov 12, 2016 · We have three separate Basic dimensions that aren’t referenced in any Feature Control Frames, which seems odd. We also have the Flag for Datum -C- attached to a size …

Whereas the earlier Weaver rail is modified from a low, wide dovetail rail and has rounded slots, the 1913 rail has a more pronounced angular section and square-bottomed slots.

Jul 23, 2025 · From MIL-STD-1913 specs to choosing a 20 MOA base, this is the definitive guide to Picatinny rails. Learn the Picatinny vs. Weaver difference & how to install your mount.

Adherence to this standard is mandatory in the preparation of drawings, specifications or technical data packages for the accessory mounting rail used for small arms weapons.

The original Picatinny specification is from 1913 and has been slightly updated in recent years. The above dimensions are generally the same as Weaver type rails but Weaver rails generally …

This is a simplistic drawing of the Mil Spec M1913 Picatinny Rail cross section. There are many rails available that are sold as Picatinny but do not meet the military specification.

Dec 1, 2025 · The physical dimensions include an overall rail width of 0.835 inches and a height of 0.206 inches above the mounting surface, which provides clearance for optics and prevents …

Dec 4, 2025 · The key difference between a Weaver and Picatinny rail is their respective dimensions, particularly the groove widths. The locking slot of a Picatinny rail is 0.206 inches …

Jun 29, 2024 · MIL-STD-1913 (Picatinny Rail): This is the older, more widely adopted standard. It defines precise dimensions for the rail’s slots, spacing, and angle. The key dimensions remain …

While the picatinny rails share dimensions with the original Weaver bases and rails, it differs in that it offers a series of slots that are deeper top to bottom and longer fore to aft, giving an …