This is the 19 round factory 12 gauge magazine for the Derya MK-12 shotgun.
Also fits the Derya MK-10 and other Derya box fed models.
Should also fit common Turkish AR style box feed guns using the stick out rear last round lever design e.g. Typhoon, Kral, Makarov, Barak, MKA and others
Manufactured from heavy duty steel with a black coated finish the magazine is fully strippable for cleaning if you remove the polymer baseplate.
Also available in 5 and 10 round sizes.