Collecting input from military, law enforcement, and civilian shooters, we have designed a magazine that can be depended on during a trip to the firing range or deployment overseas. Weapons are only as good as the feeding device used with them and you can count on our magazine to reliably function in any operational environment. Aggressive horizontal ridges provide increased gripping surface for insertion and extraction of the magazine in wet or muddy conditions. Molded of reinforced composite, our magazine has a 30 round capacity. Made in the USA and is backed by a lifetime warranty. Fits the AR15, M16 and M4 using the .223/5.56 caliber.