ProMag SD40 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.
- Magazine body constructed of heat treated steel with black oxide finish
- Injection molded magazine follower
- Magazine spring formed from heat treated chrome silicone wire
- Will NOT work in the VE version