The rear cap features amil spec type 3 hardcoat anodized. The rear cap for the MOD 9 FS and SK accepts an O-Ring.
| Manufacturer | Chaos Gear Supply |
| Pricing Unit | EA |
| Model | MOD9 Rear Cap |
| UPC | 850002123135 |
| SKU | 124959 |
| Width | 4.3000 |
| Length | 6.0000 |
| Height | 1.3000 |
| Weight | 0.1000 |
