The UMP would be pointless in INF.
The MP5/40A3 is (DUH!) a .40 weapon, the only .45 we should expect to see is a pistol (SOCOM Mk23, should be in soon i think)
So having a .45 subgun and a .40subgun.. well it just takes up much needed armory space for my Steyr Scout, doesn't it
But then again.. weapon suggestions are generally disgrearded....
P.S Where did the navy SEALs come into the equation, i said the SAS, as in the british SAS who used the Mac10.
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Stop praying. I assure you, God doesn't care