I'll throw a couple of weapons in the mix:
Handgun: Colt Delta Elite 10mm
With the .45 ACP making a comeback for SpecOps, why not go 10mm? I know it has more recoil, but for Special Forces that shouldn't be a big deal. Don't know how it'd do in adverse conditions; but I"m only seeing upside here.
Shotgun: Kel-Tec KSG
Haven't seen a torture test of the KSG yet, but its hard to argue against 15 round capacity in a 26 inch package.