Accuracy International AX AICS single stack, single feed 5-round detachable magazine (20400). Suitable for C-Series Large magnum action CL-LM variant. Below examples of compatible calibers that will feed from magazine in W&L Firearms Medium CL-LM rifle action:
The maximum cartridge overall length C.O.A.L. for this magazine is 95,60 mm / 3.764".