This FiveSeven 10rd mag extension is the ultimate upgrade to your 5.7x28 pistol. Installation takes only seconds and does not permanently alter factory magazine. Chrome silicon spring is salt water-resistant and will not take a set.
Specifications:
| Caliber | 5.7mmx28mm |
| Capacity | 10 rd |
| Finish | Black |
| Model | |
| Material | |
| Type | Magazine Extension |
| Model Fit | Five-seveN |
| Brand Fit | FN |
| Max Capacity | 10 |