Colt barrel difference

[Kitt]

I have a series 70 commander and I bought a new barrel and needless to say it doesn't fit. The rear of the barrel is .390 which fits the newer Colt MKIV series 80 slide. The series 70 barrels breech end has got to be wider. Is this like the front sight difference .125 vrs .55 ?

 

[Jim Watson]

Yes, you need a standard Commander barrel, you got an Enhanced. Send it back for exchange.

 

[Kitt]

Thanks Jim for taking the time to give me the very info I needed.

 

[Johnny Guest]

Well, I learn something new every day - - -

- - The days I'm not too lazy to keep my eyes open.

I had no idea there was a difference between standard and enhanced.
Best,
Johnny