Ensure your not left out on the battlefield stranded with no ammo, by picking yourself up an extra 400 round magazine for your H&K G36C. Keep your G36C firing continuously throughout the battle with this High Capacity magazine option from H&K. Simply fill the storage compartment in the back of the magazine, and wind the gear on the bottom of the magazine to feed BBs into the spring loaded feeding area. This magazine is made with a high quality, durable Polymer which helps keep the overall weight low and makes carrying extra magazines a breeze. Due to the design of all High-Capacity Magazines, they function better once they are broken in and the spring becomes more flexible and can be manually broken in by spraying some light silicone oil into the magazine and loading then unloading the magazine couples times allowing perfectly smooth function, every time.