The NKVD Suppressor - Soviet Style Bolter Build
 Arbites Build - Warhammer 40k: Darktide 

Mixed frontliner build - “Show me the man and I'll find you the crime”

"Some Arbitrator's from distant Vostroya have joined the fight. Because someone's got to keep an eye on these "Rejects", Corruption is a crime against the state after all.

• Shield and Maul is great all rounder for hordes and mixed armor. Mix heavies with lights for best combo for wide open sweeps and then spam heavies into your crushers and maulers, Opportunist plus your ability will provide good armor crunching and your special flashback to create a breather. No retreat and no interrogation room today!
• Bolter is your emergency holdout weapon and to deal with packs of gunners. Vostroyan doctrine doesn't believe in warning shots so ensure your Terminal Decree stacks are up to code before using to wipe a boss or crusher pack. That juicy 50 Ranged cleave and crits are very effective into bosses and ogryns. Judicious Efficiency is also mandatory for a decently quick reload time. We aint no vet so save only for em big fights, command doesn't authorize resupply for wasted shots, comrade.
• Break the Line is a great way to start a fight in melee or buy you time to shift to the bolter for maximum lethality due to lengthy weapon swap animation 
• Shockmines are for horde control and overall suppression for we must ensure the Comrade heretic's remain still to revive judgement.