The Apex 360 round pull string magazine offers the airsoft player a higher capacity, faster winding alternative to the original winding high capacity magazine. These magazines feature a slightly longer body (same size as a real AR magazine) with a braided wire pull string that will allow you to fully wind the magazine in 3-4 pulls. Unlike cheaper versions currently on the market, this magazine utilizes a metal grommet in the pull string hole to ensure snag-free performance and enhanced durability. The strong internal spring ensures smooth and consistent feeding of your electric gun regardless of the rate of fire. The Apex pull string magazine is compatible with most Tokyo Marui based M4 and M16 electric rifles.