ETS magazines are made from advanced polymers that provide extreme impact resistance so they won't crack or break when dropped. With superior temperature tolerances ETS magazines won't become brittle over time, even when exposed to harsh environments, chemicals, or extreme cold. Its durable construction eliminates creep so the feed lips and body won't spread when being stored long term, even when fully loaded. Compatible with all CZ Scorpion Evo generations Standard 40 round capacity Extremely reliable feeding with all ammo types Fits same mag pouches and couplers as standard CZ Scorpion Evo mags Works with ETSCAM-RIFLE speed loader Made in U.S.A.