The Shield Arms +5/4 Magazine Extension adds substantial capacity to your factory Glock 9mm magazines without sacrificing reliability.
- Caliber: 9mm
- Capacity Increase: +5 rounds (17-round mags) / +4 rounds (15-round mags)
- Compatible Firearms: Glock 17, 19, 19X, 45, and similar 9mm models
- Material: Aluminum
- Finish: Type III Hard Anodized Black
- Includes: Extension body, spring, installation hardware
