Well if it's a only a couple of animations I can probably churn them out. Exporting them into folders is the time consuming bit, but if you've got a use for them then it'll be worth it. No need for extra payment. Are you looking for a modern assault rifle, or something a bit older?
I just updated the pack. I added two kinds of rifle (the second could also work as a shotgun). You might wish to adjust the timings or skip a frame to make rapid-fire look snappier. I also added crouch shooting since I figured it'd be useful.
I hope you get some use out of them. Thanks for purchasing.