The Czech Vz58 Magazine is a military surplus magazine for the Czech Vz58 rifle. These are original military surplus magazines for the Vz58 and will work in any Vz58 style rifle or pistol. Each magazine holds 30 rounds of 7.62x39mm ammunition and is an authentic Czech army surplus item.

Two sources:

Czech Vz58 Magazine - 30-Round Military Surplus Magazine for the VZ58 Rifle - Keepshooting®

VZ-58 7.62x39 30rd Mag, Cope's Distributing