Stikkbomb kills marine

"‘Here is the stairwell,’ Brother Surian said. And then, ‘Grenade!’ Without
hesitation he threw himself on top of the hissing little cylinder that had
tumbled down from the stairs above. It went off with a dull crump that
blasted his body four feet into the air. His shoulder plate clanged off Avila’s
helm. In the readout, Surian’s sigil flashed crimson.
Avila dashed into the stairwell and ran up the stone steps with every ounce
of speed his body and power armour could give him. Halfway up he saw a
dark shape and fired a long burst, heard a bellow of agony, and stood, the
targeting cogitator in his helm lining them up – three orks with bolt pistols
and chainswords. They came charging down the stairs at him and died one
after the other. He set his boot on the wriggling back of the last one as it lay
wounded and blew out its skull with a single point-blank round.
‘Stairwell clear. Move up. How is Brother Surian?’
Gauros’ voice came back at him. ‘Gone, sergeant.’"

- Calgar's Siege, Page 158