The Knights Armament AR-15 Upper Receiver CQB Mod 2 11.5" URX 4 is a complete SR-15 E3 Mod 2 upper built around a mil-spec 5.56 NATO barrel and URX4 M-LOK handguard. The free-floated barrel, improved E3 round-lug bolt design, and 3-prong flash eliminator work together to deliver dependable performance, long service life, and reduced flash signature in a compact package.
This upper is well suited for shooters who want a high-quality 11.5" 5.56 NATO platform for training, range work, or duty-style configurations when paired with a compatible lower. The M-LOK URX4 handguard offers generous mounting space for lights, grips, and other accessories, while the overall design reflects Knights Armament’s focus on precision machining, durability, and thoughtful engineering.
- Manufacturer: Knights Armament
- Model: SR-15 CQB Mod 2 M-LOK Complete Upper
- Caliber: 5.56 NATO
- Barrel Length: 11.5 inches
- Barrel Twist: 1:7 Twist
- Barrel Type: Hammer Forged, Chrome Lined
- Length: 20.5 inches
| __Caliber | 5.56 NATO |
| __Capacity | NA |
| __Barrel Length | NA |
| __Optic Footprint | NA |
| __Action | NA |
| __Model | SR-15 CQB Mod 2 |
