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.

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 ...

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.

Buy Knight's Armament SR-15 E3.2 16" Mod 2 M-LOK Rifle | 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.

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.

Knights Armament 31900: This incredible SR-15 rifle from Knights Arment is chambered in .223/5.56NATO and is manufactured to military specifications. The barrel on this model in hammer-forged, chrome-lined, and is free-floated inside a URX-4 M-Lok handguard.

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. An improved E3 round-lug bolt design both enhances function and increases bolt life far beyond the industry standard.