Kraxton's 'Boltgun Crit Specialist' Shout
 Veteran Build - Warhammer 40k: Darktide 

Yet another build that mirrors one from Canary, this time being just a few talent point changes. But, now, instead of focusing on just doing raw damage, sitting in a smoke cloud, and destroying everything with your super fast incredibly good feeling Boltgun...

you sit out in the open, stack Reciprocity, and crit everything to death with your super fast incredibly good feeling boltgun! I put a Combat Blade on it instead of a Powersword as well, using the fact I don't want to use it for armor AS much to take all crit on the blade and us Flesh Tearer for some extra damage when light attack spamming the wave. To that end, I also decided to take stamina instead of the movement speed pip, to make up for the low stamina of the knife a bit since you already got enough movement speed with it, and your push attack is your main combo piece with the VI. Other than that, just light/heavy the wave for your standard diagonal into horizontal wave clear combo, or push attack into heavy attack back into light heavy to keep it going to. Push attack is your main 'insta kill thing in front of you' button, so long as you aim for a weak point, so do so and enjoy the extra stamina to do so along with the added attack speed, said speed allowing you to spam lights as well when needed.

Meanwhile the Botlgun has massive reload speed that's always up thanks to the synergy between Weapon Specialist, Fleeting Fire, Always Prepared and Tactical Reload, making it so you always have at least one bullet that then becomes a full make with a 45% increased reload speed. Then just run around slicing things and shooting things with super fast swap speeds (for a boltgun at least). Beyond that, shout, and throw kraks at Bulwarks because they are dicks, along with at monstrosities to stun them when your shout is down for massive damage. Gun down waves when you need to the space, dodge out when things get harry, and kill it all with crits funded by Reciprocity. 

Ohh, I should put something here I forgot to say in the other build too, you can reallly demolish a Monstrosity with this set up by getting at least 1 ranged specialist proced, swapping to your boltgun, dumping it with the increased attack speed, reloading as the buff is about to run out, and getting that super boosted reload for another clip. Can dump two in rapid succession that way, and it feels GREAT! and is why I thought it so good I have it on both my vet's, as I do think this is one of the best existing veteran builds. Even if you have to hoover a lot of the ammo...