I'm pretty sure he means the Laser Sight. If you're playing LA to its strengths you normally won't be anywhere near the enemy's LoS to begin with so the red beam isn't really an issue (hint: most people don't look up ). I pretty much always choose the Laser Sight over the foregrip when playing LA since it increases the range within which the carbine can accurately fire without having to slow down and aim down its scope. I'm not familiar w/ the Merc specifically since I've played mainly VS, but the VX6-7 (close range VS carbine) + 3.4x scope + Laser Sight can't be beat for indoor work. The higher RoF puts its damage output thru the roof, and its CoF w/ the Laser Sight is tighter than the default carbine and lets you nail Surfs and Elmos out to ~40m w/o scoping. It's even accurate enough to be fairly usable in mid-flight. I'm sure the NC have an equivalent varient but I dunno its name. If it's the Merc, then yeah you def want to use a Laser Sight w/ it.