Lightweight durable polymer shell with metal internals Compatible with LM4 based GBB M4 rifles High in reliability and getting every shot out Fits and feeds flawlessly with KWA LM4 and other similar GBB rifles Unique stipple on the mag making it easier to grab in high-stress situationsSpecifications: Brand PTS Syndicate Build Metal Internals / Rubber Gasket / Polymer Shell Magazine Capacity 38rd Low Capacity Compatibility GBB LM4 GBB Rifles Color DARK EARTH 1X Magazine