I didn't read fully through the older ones, but anyhow, I've got more than just the lasgun and MD for you...
I would put the clips as including the starting clip. So...
Rifle: 30 bullets per clip, 7 clips.
Shotgun: 8 pellets per shot, 7 damage per pellet, 8 shells in a clip, 4 clips total. Also, this is just me, but, I would add that the shotgun is really not a bad killer of ground eggs at S1, if you get that far, but that's about the only time it's good against any structure. It takes exactly 5 full shots to take an egg out.
Lasgun: 200 ammo, 300 with battery pack. Also, I'd add in that it always hits DEAD on. There is NO shot spread when firing.
Mass Driver: Just on the blue text; 5 shots per clip, 7 per clip with battery pack, and there are 5 clips total, regardless of battery pack.
Hope that helps, keep going and good luck.