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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: Enfield #1 MK3 303 British
- Capacity: 10 Rounds
- Material: Steel
- Finish: Blued