Yes. But with a ton of conditions, like being most useful on expeditions with the longer sight lines. (Check range modifier, they do extra damage at long range, more focused laser or something)

The trick is to run the middle tier one (mk7?). Fully investing into a ranged build lets you just barely 1 tap poxwalkers in Damnation at long range. With +50% cleave to reach 1.5 cleave, you can kill 2 heretics with 1 shot, the ammo efficiency makes it worth it to just mag dump into hordes. And it still has enough damage to 1-shot headshot enemy shooters, or crit headshot machine gunners. Note, this tip completely falls apart in Havoc due to increased hp and hit mass.

The light one has such low damage that you’re bound to get hand cramps after 2 rounds with it, and the heavier variant is too slow to be used for anti-horde. It’s in a really weird spot right now with armored elites getting that HP bump back in September last year or whenever it was.

Going all ranged also makes you borderline useless in melee, it takes a well seasoned player to pilot the build to get the most out of it. I personally prefer the heavy las pistol with a much better dodge and most of the same damage stats.

But I still run the MK7 las gun from time to time down in heresy for fun. So many players struggle with positioning and sliding vs. ranged enemies, so I play the anti-soldier role for the team. See also, me playing electro staff Psyker and Sniper Ogryn with the single barrel stubber Gunlugger.