Marksman K1A GBBR 30rds Gas Magazine with Korea Marking
 
KOREA version marking of VFC M4 V3 gas magazine.
VFC Gas Magazine - Versatile and Compatible
Korea Marking /Limited Edition
Magazine Capacity : 30 Rounds
Bullet : 6mm BB
Material : Alloy , Aluminum, Nylon, Rubber
Marksam : MAG-010