This is fine if you only use one firearm. Weaver rails have a slot width of 4.57 mm but aren’t consistent in spacing between each slot, meaning that the grooves of two different Weaver rails may not align with each other. Modern Weavers now also come on a single rail system that negates the need for low tolerances during installation. Older Weaver rails used a two-piece system, but this required exacting precision during mounting or scopes wouldn’t be aligned properly. The Weaver rail system can still be found in older firearms, especially ones made before 1995. military standard until Picatinny was adopted in 1995. The Weaver system was so revolutionary that it wouldn’t be replaced as the U.S. Developed by William Weaver in the 1930s, his invention brought the rail mounting system within easy reach of the average hunter. Weaver Rail SystemĪmong the systems in this list, the Weaver rail is the oldest.
In general, most modern rail systems are made to fit older accessories, but older rail systems will need adjustments to fit modern attachments. Modern rail systems have been standardized to accommodate different brands, though older rail systems are still used. These may include tactical lights, optical sights, forward handgrips, and bayonets. The RIS or Rail Interface System is a term used to describe the system that allows users to quickly attach accessories to a firearm without complex tools. This article will discuss the differences between rails systems, whether M-LOK, Picatinny, Weaver, or Keymod rails. However, not all rail systems are built the same, and each has its advantages and disadvantages over the other. Rails allow users to quickly slot in attachments and accessories to their weapon depending on the changing circumstances on the battlefield. Differences Between Rail Systems M-LOK, Picatinny, Weaver, and Keymod RailsĪ fundamental characteristic of modern firearms is adaptability, whether in actual combat or an airsoft MilSim.