Knight's Armament SR-15 E3 Mod 2 5.56mm NATO 16" Semi-Auto Rifle with URX-4 Handguard & Full Ambi Controls
The SR-15 E3 Mod 2 is Knight’s flagship 16-inch carbine, built around the company’s proprietary E3 round-lug bolt for long service life and reliable extraction. This full-size AR-15 platform rifle pairs a chrome-lined, hammer-forged barrel with the lightweight, free-float URX-4 handguard, delivering accuracy, durability, and modern accessory compatibility. Fully ambidextrous controls and Knight’s two-stage match trigger round out a package designed for professional users and enthusiasts who demand premium features.
Condition
Overall Condition: Good – Shows some signs of prior use and handling.
Bore Condition: Excellent – Clean, mirror finish, no signs of wear.
Rifling Condition: Excellent – Sharp lands and grooves.
Specific Condition Notes: Two small scratches on the receiver expose bare metal. The handguard displays extensive surface scratches, and the front Picatinny rail sections have several gouges.
What's Included
- Knight's Armament SR-15 E3 Mod 2 rifle
- 1× 32-round Knight’s factory polymer magazine
- Factory-installed Knight’s folding Micro front and rear sights
The 16-inch barrel is chrome-lined, hammer-forged, and threaded 1/2x28 for muzzle devices or suppressor mounts. Knight’s 3-Prong QDC flash eliminator is installed and ready for KAC suppressor attachment.
The URX-4 free-float handguard combines a continuous Picatinny top rail with M-LOK slots for flexible mounting. Its slim profile keeps weight low while preserving strength.
Fully ambidextrous controls—selector, magazine release, and bolt release—allow seamless operation for right- or left-handed shooters and make manipulations intuitive in any position.
Knight’s two-stage match trigger breaks at approximately 4.5 lb, providing a clean, predictable pull for precise shot placement.
The forged 7075-T6 aluminum receivers wear a Type III hard-coat anodized finish, matching the collapsible six-position stock and Magpul MOE grip for a cohesive, duty-ready build.