What's wrong with saving weight on a part that doesn't deal with any stress?
Well, considering how much one pays for a Kimber, I can't imagine them putting plastic anywhere on the gun. I agree with the above posts though that it is probably a non-issue.
For a top dollar, top quaility handgun, a plastic mainspring housing seems to cheapin the overall value of the pistol. I own a Rock Island 1911 and the mainspring housing is plastic, but I paid $400 for it. Not a $1000 for the Kimber. My
Well, considering how much one pays for a Kimber, I can't imagine them putting plastic anywhere on the gun. I agree with the above posts though that it is probably a non-issue.
The idea that there is not stress on a 1911 MSH is simply wrong. The mainspring in a 1911 is under at least partial tension even when the gun is not cocked (that is why the mainspring cap and the retaining pin are needed). Never mind that said level of tension increases every time the action is cycled and that having metal parts rubbing against plastic will wear the plastic out eventually.
And the gun is only 25 ounces unloaded. A little extra weight probably helps.