I use this holster with an Armscor officer size 1911. It's all iron, with no alloy whatsoever. It's heavy. This holster does a great job keeping it in place. It does not allow the gun to shift or move at all. It is the best IWB holster I have owned so far.
Pros: Holds the firearm securely in place, no matter what position I am in
Cons: none that I can think of
This review was written in the old system and had content requirements that are different than reviews written today.