The Pearce Grip Extension for Glock Full Metal 9+3/40+2 unit adds capacity to Mid and Full Size Glock high capacity magazines. This magazine extension replaces the original floor plate and internal locking plate and adds two rounds to a 9mm; two rounds to a 40SW and 357SIG and one round to a 45GAP magazin.e

• Alters the capacity of High Capacity Full Metal Lined Glock magazines.
• Adds three rounds to the 9mm two rounds to the 40SW and 357SIG and one round to the 45GAP models.
• Made from High Impact Polymer and withstand drop tests at temperatures from -20 F to 350 F.