This is the 10 round magazine for the Mossberg 802 & 801 bolt action Plinkster rifles.
Will also work in the Anschutz 520, CIL 300 and Anschutz 525 semi-autos by removing the side stop lug. The easiest way of doing this is to grind it off. We have seen some which have been very carefully hammered flat.
Manufactured from blued steel this is the standard factory mag.