The ets pistol mag is constructed of an extreme impact resistance advanced polymer with superior heat, cold and uv resistance, translucent body, and is creep resistant which means the feed lips and body won't spread when being stored long term even when fully loaded.This mag features an easy disassembly with ets's specially designed base plate and is also designed to be compatible with glock extensions.The ergonomically designed floor plate makes it easy to grab from mag pouches.Caliber: 9mmCapacity: 31rdModel: Pistol MagsMaterial: PolymerCapacity: 31Magazine Restrictions: The following states have magazine restrictions. Your order will not ship to those states if in violation of these laws and will be subject to cancellation and a 15% restocking fee. California - Limited to 10-round capacity. Connecticut - Limited to 10-round capacity. Colorado - Limited to a 15-round capacity. Delaware - Limited to 17-round capacity. Hawaii - Handguns limited to 10-round capacity Illinois (Cook Co, Aurora, Highland Park) - Pistol mags are limited to 10 rounds. Massachusetts - Limited to 10-round capacity. Maryland - Limited to 10-round capacity. New Jersey - Limited to 10-round capacity. New York - Limited to 10-round capacity. Road Island - Limited to 10-round capacity. Vermont - Handguns limited to 15-round capacity, Rifles limited to 10-round capacity. Washington DC - Limited to 10-round capacity. Washington - Limited to 10-round capacity.