Knight's SR-15 E3 Mod 2 series 5.56mm 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. The 5.56mm 3-Prong Flash Eliminator interferes with propellant gas combustion forward of the muzzle to significantly reduce flash signature, will not ring upon firing or when struck, and is compatible with the Knights line of 5.56mm QDC Signature Reduction Devices.
| Gun Platform | AR-Style |
| Caliber | 5.56x45mm NATO |
| Model | Upper Receiver Kit |
| Type | Complete |
| Barrel Length Range | 16" to 16.99" |
| Sights | Flip Up Front & Rear |
| Muzzle | 3-Prong Flash Eliminator |
| Firearm Fit | SR-15 MOD 2 |
| Handguard Finish | Black |
| Handguards | URX4 M-LOK |
| Receiver Finish | Black |
| Receiver Material | Aluminum |
| Twist | 1:7" |
| Weight | 4.30 lbs |
| Barrel Description | Cold Hammer Forged Chrome Moly Steel |
| Barrel Finish | Black |
| Barrel Length | 16.10" |
