This magazine is compatible with your diamondback db9 gen 4.It features a finger extension.
Caliber: 9mm Luger
Capacity: 6rd
Finish: Black
Model: DB9
Material: Steel
Type: Magazine
Model Fit: DB9G4
Brand Fit: Diamondback
Capacity: 6
Caliber: 9mm Luger
Capacity: 6rd
Finish: Black
Model: DB9
Material: Steel
Type: Magazine
Model Fit: DB9G4
Brand Fit: Diamondback
Capacity: 6