Magazine is compatible with your ruger mark iv 22/45, 22/45 lite.*note- this mag is not recommended for ruger mark iii 22/45 pistol.
Caliber: 22 LR
Capacity: 10rd
Finish: Nickel
Model: Mark IV
Material: Steel
Type: Detachable
Model Fit: Mark IV 22/45
Brand Fit: Ruger
Capacity: 10
Caliber: 22 LR
Capacity: 10rd
Finish: Nickel
Model: Mark IV
Material: Steel
Type: Detachable
Model Fit: Mark IV 22/45
Brand Fit: Ruger
Capacity: 10