This is a Pearce Grip known as the Grip, model PGGP-MID.
This 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 three rounds to a 9mm; two rounds to a 40SW and 357SIG" and one round to a 45GAP magazine.
Features:
High Impact Polymer
Increased Comfort and Control
Added Gripping Surface
