T he 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 ...

Military tough and exuding high-performance on every level, the KAC SR 15 lineup includes full rifle builds, as well as the upper and lower receivers you need to build your own masterpiece.

The Knights Armament SR-15 E3 Mod 2 Series rifle offers AR aficionados and first-time owners with a high-quality, semi-auto rifle platform that enables users to do everything they need, whether it's precision shooting or close-range rapid fire.

The SR-15 E3 MOD 2 series’ 5.56mm NATO barrel is manufactured for military grade durability, and is free-floated inside a URX 4 M-LOK handguard. An improved E3 round-lug bolt design both enhances function and increases bolt life far beyond the industry standard.

The SR-15 E3 Mod 2 series’ 5.56 mm NATO barrel is manufactured for military grade durability, and is free-floated inside a URX4 M-LOK handguard. P/N:31949.

The Knight’s Armament SR-15 (Stoner Rifle 15) is more than another AR with enhanced furniture. Beginning with the E3 Enhanced Bolt which features an enlarged bolt face, rounded lugs and thicker bolt web for improved durability, the SR-15 delivers quality and …

Shop Knight's Armament SR-15 Semi-Auto Rifle, 5.56x45mm NATO, 16 in barrel Compatible Parts, Ammo & Accessories from Knight's Armament and more.

The SR-15 E3 Mod 2 series’ 5.56 mm NATO 14.5″ chrome-lined barrel is manufactured for military grade specifications and is paired with a proprietary length gas system. This mid-length gas system improves reliability while reducing felt recoil under use.