This fiveseven 10rd mag extension is the ultimate upgrade to your 5.7×28 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.
Caliber: 5.7x28mm
Capacity: 10rd
Finish: Black
Model: FiveSeven
Type: Magazine Extension
Model Fit: Five-seveN
Brand Fit: FN
Capacity: 10
