Constructed with a high density polymer build to withstand combat terrain Compatible with most AK74 series AEGs Textured magazine non-slip exterior assists in faster reloads Uses a winding Uses a winding wheel that provides tension to consistently feed BBs Hi-Capacity magazine holds a large reservoir of up to 550 rounds In the Box 1X Magazine Specifications: Brand Echo1 Build Polymer Compatibility AK74 Series AEGs Color BLACK California Proposition 65 Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov