M1913

The M1913 rail is a military-standard attachment system for optics and accessories on AR-style rifles and most modern semi-automatic pistols and some revolvers. Also known as “Picatinny” or “Pic” rails from their development by engineers at the Picatinny Arsenal in New Jersey in the 1990s, the M1913 rail is a flat row of rectangular cutouts running perpendicular to the rifle or pistol’s barrel. These are often machined into the top and sides of rifle handguards as well as the top of a rifle’s receiver. On pistols, M1913 rail sections are typically built into the portion of the frame or grip module just in front of the trigger guard.