When I compare the P-09c to my ODG P-07, the internals look identical, including the frame rails. There are a two minor external dimensional changes between the two. One is the P-09C slide are a touch taller and wider at the top. The trigger guard is also a little lower. It is enough to make the P-09c a tight fit in my Tier 1 Concealment holster. The slides interchange between the two without issue and function properly.