ProMag magazine bodies are constructed of high carbon heat-treated steel and TIG-welded for strength. The springs are precision wound using heat-treated chrome silicon wire. Bases and followers are injection molded from polymers selected for their durability. The result is quality, consistency, durability and reliability.
Specifications: Caliber: 308 WIN, Capacity: 20 Rounds, Body Material: Steel, Floorplate: Steel.
This is for one PRO MAG M14 M1A 20 round steel magazine.