The Knight’s Armament Company SR-15 line represents the pinnacle of firearms based upon the Eugene Stoner designed operating system. The Mod 2’s 16” chrome lined, 5.56mm NATO barrel is manufactured to military specifications, and features a proprietary mid-length gas system that increases reliability and durability while also reducing felt recoil. An improved E3 round-lug bolt design both enhances function and increases bolt life far beyond the industry standard. An ambidextrous bolt release, selector, and magazine release offer left-handed users the ergonomic advantages inherent to AR15-based controls, as well as giving right-handed users alternative methods of manipulation to increase efficiency of movement. The drop-in two-stage trigger serves double duty as an aid to long range precision marksmanship while enabling surgical speed shooting at close range.
The E3 Enhanced Bolt from Knight’s Armament features a number of components designed to make this bolt the most durable and reliable bolt available. It is a proprietary bolt specifically designed for our SR15 and 16 models. The E3 Bolt boasts several features that add to the its overall performance such as the enlarged bolt face, rounded lugs, reduced cam pin, and proprietary extractor and firing pin designs.
Knight’s Armament designed this system to give shooters the maximum amount of options in their controls. Under this design all of the weapon’s major controls can be accessed from either side of the lower receiver. Left-handed shooters see the immediate benefits of being able to access the weapon’s controls in a more intuitive manner; however, there are a number of other benefits that right-handed shooters will enjoy under this system.
All of the weapons available from Knight’s Armament come equipped with a 4.5lb, 2-Stage Match Trigger. This type of trigger mechanism uses a system where, during the rearward squeeze of a trigger, it cycles through two stages of resistance
The evolution of the Universal Rail Extending (URX) begins over 20 years ago with Knight’s Armament pioneering the Modular Weapon System. Knight’s URX is a lightweight, free-floating, continuous top rail system that was designed to give a shooter the most diverse amount of placement options for any accessories they deemed helpful.