Originally Posted by
Robinson
I agree 100% with the advice given by farscott. Colt barrels are excellent, so I personally would not swap that out. Plus slide to frame fit is not typically a factor in the accuracy of a 1911 so unless it simply bothers you there's not a lot to be gained from tightening it up.
One thing I've been experimenting with lately in my 9mm guns is the Wilson Combat flat wire recoil spring. I have them installed on two of my Colts and like them a lot so far.
With your CCU the reliability package is probably a good idea, though it's a shame the gun needs it.