The combination of 400 series stainless steel and teflon heat treatment makes this magazine one of the most heavy-duty in the industry. It can take a beating that would destroy an aluminum magazine and continue to perform. All CPD magazines feature the new "snap on" anti-tilt follower. The use of the .020 gauge material in stainless steel combined with increased interior dimensional room ensures proper stacking of the rounds and reduces failure due to jams. Functionally, this magazine is far superior to any in today's market.