Quote Originally Posted by 120mm View Post
Here is a link to illustrate the relative lack of effectiveness of the 5.7 x 28mm round.

http://lightfighter.net/eve/forums/a...3621062102/p/1

I would submit that instead of saboting a necked down 9mm round, why not just saboting a regular 9mm round and retaining the original barrel diameter? There is significant hype involving effectiveness of the PDW rounds on soft targets, but I'm not convinced.
I think the amount of testing NATO has done 5.7 and 4.6 is quite conclusive. I have all the PASGT and CRISAT performance data, as well as permanent wound channel performance. The only useful data absent seems to be autopsies.

...and fire from a handgun, both rounds suck. Stay with 9mm.