All dura- matics that I've seen had a one piece plastic grip. They don't have a metal grip frame. Bolt goes thru the grip to hold it on. No hold open at least mine didn't have it. Pretty good plinker but magazines cost a lot. H-K makes magazines but they are sorry. For that price a Ruger or Buck Mark is a better buy. I have a S-101 Super matic It is all steel and shoots good.