The Glock 21 Gen 4 is a full-size striker-fired handgun chambered in .45 ACP. Perfect for duty use, self-defense, and tactical applications, the G21 has a legendary reputation for being solid and dependable. It features Glock's Safe Action Trigger and uses double stack 13 round magazines. These Glock 21 Gen 4's were picked up by Guns.com in a Law Enforcement Trade-in and come equipped with tritium night sights. 2-13 round magazines are included with each purchase. Any firearm that can stand up to daily wear and tear on the force is a trustworthy addition to your collection, whether you plan to use it for personal protection or as a range gun. Law enforcement trade-ins are usually fired less than other used firearms. They have wear from daily duty use, but most LEO only shoot their firearms when qualifying at the range. So, despite mild cosmetic damage from holsters and handling, the barrels and internal components are usually in great condition. Our police trade-ins are a unique opportunity to own a dependable, high-quality firearm at a great price! Law enforcement trade-in's vary in condition. Some will have armory marks, others retain their police department crests, and almost all of them show signs of use (holster wear, nicks, dings, etc.). The condition will not be the same from one to the next, but they all fall within the same category of condition.