Ten Nations have under the umbrella of the NATO Research and Technology Organization (RTO) formed a team with the objective to standardize a NATO rail. In the past the standard was known as the MIL-SPEC 1913 "Picatinny" rail system, named from the Picatinny Arsenal in New Jersey, where it was originally tested and was used to distinguish it from other rail standards at the time.
Being the new standard, ETA has adopted the NATO NAR (STANAG 4694) on ALL of our products.
On a typical Mil-Std-1913 rail the grabber is clamping the rail on the v-angles.
On a NAR STANAG 4694, the top surface is used as a reference and alignment of the grabbers.
Tolerances were tightened approximately 50%.
100% Backward compatibility with MIL_SPEC 1913 "Picatinny" accessories.