Hi Bruce,

they used the same action in the K11 like it is in the G11 so that a G11 mag should fit into your K11 too. I never fired an 31/55 but i have an G11 and it is a great rifle. This guy over here has some mags for an K11/G11 you can contact him he is normaly very helpful.

Sportarms - Partner für Großkaliberschützen - Ersatzteile K11

Regards

Gunner
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