Kimber Solo 8 Round 9mm Extended Magazines are factory original magazines. These extended magazines have a capacity for two additional bullets. Two additional bullets may not seem like a lot, but it can be the difference between life and death. Those of us who conceal and carry our weapons can appreciate exactly how important additional bullets are. The advantage of semi-automatic pistols over revolvers is the ability to hold more ammunition. A 6 round magazine does not capitalize on that advantage, while this 8 round extended magazine does. Kimber extended magazines feature an included finger extension to help make the gun and magazine more comfortable to hold. Factory magazines are built to the same standards and specifications that your original magazines were, and thus have the best fit and function for your gun.