I have what I was told was a WWII gun, it has a Remington frame and a Colt slide. The slide rests about 1/8 of an inch forward - or you could say that the rear of the frame protrudes from the slide by an 1/8. Every other 1911 I've seen this is flush. Were tolerances so loose that because different manufacturers were involved the parts don't fit so well? Or is this a problem I should be concerned with?