This is the Steyr 10 round 9.3x62 magazine magazine is for the Steyr CLII and Steyr SM12.
Will also fit the older Steyr Pro Hunter and Steyr Classic models.
Designed to allow the walnut stocked Steyr CLII, Steyr SM12 rifles to use a ten round magazine, a feature previously limited to synthetic stocked models (Pro Hunter, Scout, Elite) that accepted the Steyr Extended Magwell adapter and Steyr 10 round Universal Magazine.
The design is based on the 10 round universal magazine with the addition of a side mounted locking mechanism.