The ProMag AR-15 Roller 5rd Magazine features a capacity of 5 rounds and is constructed from black polymer. This magazine is compatible with the AR-15 platform and is designed for .223 Rem and 5.56 NATO calibers. ProMag magazines are made in the USA and are backed by a lifetime guarantee against manufacturer's defects.Key FeaturesCapacity: Holds 5 rounds of .223 Rem/5.56 NATO ammunition.Material: Constructed from durable black polymer for long-lasting use.Manufacturer Guarantee: Backed by a lifetime guarantee against manufacturer's defects.