This is a AR-15 magazine.223 / 5.56, 30 round capacity, made by The Mako Group.
Manufactured in Israel and made to withstand the toughest combat conditions, these magazines feature a reinforced floorplate, heavy gauge steel, and a fine resistance coating that lasts up to 96 hours in salt spray tests. They also feature a white no-tilt follower for unwavering reliability.
