The Pearce Grip +3/2/1 Magazine Extension for Glock® 26, 27, 39 pistols is a drop-in mag extension, offering +1, +2, or +3 rounds of ammunition for optimal firepower in concealed carry applications. Features precision-molded polymer construction for superior durability and a snug, slip-free fit. The extended grip surface features aggressive texturing for improved comfort and weapon control. Plus, the drop-in design allows for simple, tool-free installation. Compatible with Glock factory magazines ONLY (not included).