| Weight | No |
|---|---|
| Color | Black |
| Finish | No |
| Materials | No |
| Manufacturer | No |
| Warranty | No |
| Compatibility | AR-15, M-16 |
| Gas Tube Type | No |
| Handguard Length | No |
Thread Pitch
|
Multiple Thread Pitchs Available |
| Fluting | No |
| Model | No |
| Manufacturer's Suggested Retail Price | $6.95 |
The castle nut is used to secure the carbine receiver extension on standard AR-15s.