Making a specimen bleed out and stagger a larger crowd behind it, is crucial for having enough time to reload. Semi auto or small bursts has to be utilized if Bullpup were to be used off-perk.With very large ammunition pool, Bullpup can sustain bullet barrages in the waves for longer duration with smart positioning compared to other assault rifles and tommy guns. By compensating for movement, it's possible to shoot on the move while changing positions. Though aiming down the sight is advisable, the low recoil of the Bullpup makes it very efficient at firing 'from the hip'. Against large clusters of weak enemies this can be used in a hose down tactic, mowing down entire mobs by sweeping your sights across head level while firing full auto. When coupled with the Commando perk, the low recoil of the Bullpup allows it to be fired on fully-automatic without a noticeable drop in accuracy, so aiming for the head can be a good idea even on full-auto.Be ready to switch to fully-automatic for tense moments, especially for sweeping large groups after a big specimen tackled by the team, extending ZED time or focusing down medium specimens. With the holographic sights, it's fairly easy to headshot lesser specimens from long range.
For letting a single target bleed out slowly and stagger the horde, will give you plenty of time for reloading a fresh magazine. Using semi-automatic fire is very useful for ammo conservation but requires double tap headshots more often for the kill from a safe distance. Select fire mode between semi-auto and full-auto is convenient for picking small targets or manage reload times.The Commando perk gets a discount on the Bullpup from the Trader, and spawns with it at Level 5.