The magazines for the bolt action Mark XXII and the semi-auto Mark XXII are not interchangeable.
Mark XXIIs with either a 5 digit serial number, or a serial number with a J prefix will use the semi auto magazine, part number 4751. These semi-auto magazines can be best located with either Numrich, Brownells, or Jack First gun parts.
Bolt Action style Mark XXII magazines can be purchased from Anschutz. The part numbers for the magazines are:
- #012961 1517-U4 Magazine 4-shot, cal. .17 HMR
- #001153 1420-U5 Magazine 5-shot, cal. .22 LR
- #001154 1420-U13 Magazine 10-shot, cal. .22 LR