I'm a gunner and I use both - dam near all the time. sometimes i opt for a medium scope on KF and WW insted of laser. I always use the grip. I really only have one attachment option.
If the gun doesn't allow for a grip it feels like christmas in the armory....lol
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"The truth is more important than the facts."
- Frank Lloyd Wright
yeah i used to always use the rifle laser, but since i unlocked the grip i seem to always choose that. I usually put it on an iw/m4/552 depending on the map, with a scope/silencer depending on the map as well.