at this weekend's upcoming show, i'll be shopping for a new colt 1991A1 . i would rather have the new roll marked model , but if the price was right i'd consider the older marked pistol. am i correct in asuming that all of the new roll marked 1991's have the extractor made from bar stock material ? also, did some of the later, old roll marked guns have this bar stock extractor ? if so , without removing the extractor while inspecting a weapon, can 1 tell if it has the new bar stock or older MIM type ?. i;m also open to your suggestions & advise on which model would tend to have fewer probems ( i. e. plunger tubes, reliability, etc ) thanks much for your help.