The Dark Elf Particles Rifles are powerful weapons powered by dark energy and used by the Dark Elves of Svartalfheim, in order to fire blasts of dark matter particles able to tear appart living tissue on a molecular level.
In the battle between the Dark Elves and the Asgardians during the first Convergence, Dark Elf warriors used particle rifles in battle, giving them an advantage over the more melee-reliant Asgardians.
In the common era, the Dark Elves continued to use particle rifles as a primary means of ranged offense. They were used in various battles like the Sacking of Asgard, the Second Battle of Svartalfheim, and the Battle of Greenwich. In the aftermath of the latter conflict, various pieces of Dark Elf technology, particle rifles included, were confiscated by S.H.I.E.L.D. as harmful material.