ZEV Technologies +5 Basepad for Glock 17 Magazine, Red - ZEV BPADG175R

This magazine extension basepad increases capacity by 5 rounds on 9mm or 4 rounds on .40 caliber for standard Glock 9mm and .40 magazines. The lightweight, durable 3-piece design allows easy installation, removal, and reassembly without damaging the magazine body and includes an extended magazine spring.