You sir,Are a guy who could be good enough to make a decent weapon pack.
You can make one of each type.
Assault rifle:HK-417
Pistol:M.Pistol AND/OR You could make a semi auto pistol.
Sniper:You should make:http://en.wikipedia.org/wiki/Heckler_&_Koch_PSG1 It's made by the same guys
who made your HK-417.
SMG:M.Pistol AND/OR Make:http://en.wikipedia.org/wiki/MP_40 Or somthing like this.
Maybe you could make a Rocket L?
Maybe A shotgun of some sort?
Maybe a Minigun (An idea.)