This is what B5 Systems says :
 
 
Our large-profile guard made of quality composite material

This curved trigger guard has the same glove-friendly profile as our aluminum version but at a fraction of the price. Designed with cold weather and tactical operations in mind, the guard also has a swing-down feature for use with heavier winter gloves.
	
Features:
	
Swing-down pin release
	
Made of composite materials