Product Description SPECIFICATIONS: MANUFACTURE: LANCER TACTICAL MATERIAL: METAL/POLYMER CAPACITY: 300 RD. HI-CAP COMPATIBLE: LT-01,LT-02,LT-03,LT-04,LT-15,LT-19 (AND MOST M4 AEGS) FEATURES: 300RD HIGH CAPACITY MAGAZINE BUILT WITH A METAL SHELL FOR DURABILITY. BOTTOM NYLON POLYMER WINDING WHEEL. COMPATIBLE WITH ALL LANCER TACTICAL M4 AEGS AND MOST STANDARD M4 AEG RIFLES. DESIGNED WITH A HIGH TENSION SPRING. FEEDS INTO AEG SEAMLESSLY. WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov/product Customer Reviews