On-topic, I'm personally working on a 2k-LS integration that allows me to still use a pump-action foregrip; I remember the last DCNO there were many-a-time when I wished I had a quick second shot ready to hit the person after a dodge. Given, a pump-action LS is pretty quick, but I'm talking about on the magnitude of within a second. Also, a shot to cover me while I reload the clips seemed like a good idea. It doesn't quite classify as an alternate-fire per say, but it does fall under the realm of a gun that is fitting for a greater variety of situations/extending the usefulness of the gun. After all, 2 medium-long range shots are better than one, eh?
~ompa
I made a longshot 2k, it's in my signature. I made the pump so it's pump action. It was not the best looking but it got the job done, at a few of the wars I went to.
On topic though: I like Cmdramack's idea of integrating Big Salvo's on other guns. That along with imaseolman's idea with the SMDTG trigger. n fact, I'm working on something like that right now.