veteran, sniper rifle, lasgun, precise, long-range, scoped, bolt-action, high-velocity rounds, custom stock, engraved metal, worn grip, battle-scarred, grimdark, Warhammer 40k universe, industrial environment, rusted metal structures, flickering lights, dark corridors, co-op action, strategic positioning, aiming down sights, suppressive fire, tactical reload, ambient occlusion, dynamic shadows, muzzle flash, spent casings, chainsword sidearm, grimy texture, oily sheen, atmospheric lighting, 3/4 view, action pose.