Army is not leaving out 9mm, b&t tp9s replacing all smg category weapon.we are going see multiple units using tp9s in coming years. The X95 is a well proven COIN weapon, and it is now standardized as a infantry weapon among IDF. Using x95 for 9mm is not a desirable option coz using 9mm in a gas operated gun prone to malfunction in adverse(as I mentioned earlier,only 9x19mm worth of powder have tough time to generate enough gas to push the BCG to recycle). 9x19mm parabellum are meant to shoot in blowback action like tp9. Compare the size between x95 and tp9. But ballistic performance is very similar. Modern Infantry units usually avoid 9mm based guns as primary weapons. They use it only as a side arm. In other words tp9 does the job of bigger 9mm x95 in much smaller package. X95s are very good at spitting 5.56x45. I concur They are very potent option for infantry carbine replacement. It is most probably overlooked imo AR guns are much cheaper. For 9mm no matter what, even with tgw longer barrel it only increase the accuracy, do not increase penetration power. As I said earlier,bigger the bullet higher the drop rate. It means the bullet starts to tumble mid air over 100mts. Even tp9s(mostly suppressed) are going to be deployed in really tight spaces like indoor ops, not in open area operations. I think the concept of issuing cqb weapons,dawn from the idea of ambush like situations. In an ambush,LMGs and carbines(including X95s) will excel. Since carbine is more agile weapon.