I'm running a support class that combines spotting and explosive support. I'm currently using a L-TAG and JAW with Side Pack, so I have 2 missiles and 15 grenades. Now while the JAW does the business, the L-TAG is a bit weak due to the detonation delay and is pretty bad against armoured people (which is almost everyone) so is only good for suppression, not many kills.

I'm thinking of changing it out for an Assault Rifle attachment Grenade Launcher, but wanted to ask a few questions before I grind some kills for the attachment module to unlock it.

a) How they fare in terms of power and radius compared to L-TAG grenades. Better, worse or same?
b) Do they explode on contact like the JAW or delay like the L-TAG?
c) How many rounds do you get? Does Side Pack 3 increase it, and if so by how many?
d) Which is the best long-range AR? I'll mainly be spotting, but I may take the occasional shot if I see a sniper who hasn't seen me, especially as I won't have many explosives anymore.

Thanks in advance.