ProMag HECA17 9mm 40-Rd Black Polymer Magazine - Fits H&K MP5 / PTR9

The ProMag HECA17 is a high-capacity, 40-round detachable 9mm Luger magazine engineered specifically for the H&K MP5 and PTR9 9mm platforms. Built around a rugged black polymer body, this magazine delivers reliable feeding and corrosion resistance for range training and recreational shooting.

Constructed from durable DuPont Zytel polymer with reinforced feed lips, the HECA17 combines the strength and dimensional stability needed for high-capacity pistol-caliber carbine use. The lightweight polymer body resists corrosion and stands up to repeated handling, while the reinforced feed lips maintain consistent geometry round after round.

Designed as a drop-in replacement or spare for factory H&K MP5 variants and the civilian PTR9 9mm carbine, the HECA17 provides additional on-hand capacity for range days and training sessions. This ProMag 40-rounder expands your firepower on the line.