New mid-cap model made of hi tech tecno polymer made under license of HEXMAG inc. USA replica of the original tactical magazine used by SWAT team stainless steel spring with hi performance and perfect bb feeding hexagon patented shape give excellent grip even when wearing gloves lower end top with interchangable color button allows recognizing the bbs inserted in a second compatible with m16, m4 Marui,g&p,dytac etc....