Originally Posted by
Hmac
Reportedly, the 5 inch slide/barrel assembly fits just fine on the older version frame, M1 or M2 (not correct nomeclature, but how the two versions are called in common parlance). It would be nice if it was available separately as a kit. Anyway, from what I read on the Walther forums, you could buy the 5 inch M2 and use the slide and barrel on your compact-version M1. Walther has said there won't be an "M1" version of the 5 inch, but who knows?