Had ogryn on my face watching that.
This one’s set in the even grimmer and darker universe of the year 40K.
And it’s all quite supremely 40K, by the looks of things.
There are a few weapons in play here.
Obviously there’s the chainsword, a 40K staple.
There’s also a lasgun for the Veteran, which is a kind of DMR-y ranged option.
All of this is supported by the writing of Dan Abnett, of Horus Heresy and Marvel Comics fame.