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Memory Alpha
Multiple realities
(covers information from several alternate timelines)

A disruptor rifle was a weapon, a rifle modification of a disruptor. These weapons were used by Klingons, Romulans, and Cardassians. They gave off more energy than a disruptor pistol.

The Klingon version of this weapon had induction coils that could burn out. (DS9: "Honor Among Thieves")

In the mirror universe of 2370, Quark tried to defend himself with a disruptor rifle but was overwhelmed by Klingons. (DS9: "Crossover")

Karnas of Mordan IV displayed two disruptor rifles on the wall behind his desk, one of them was a modified Klingon disruptor rifle. Karnas took the modified Klingon disruptor rifle and aimed at Admiral Mark Jameson but did not shoot. (TNG: "Too Short a Season")

A party of Ferengi led by Quark and Rom with the mission of rescuing their mother Ishka from Dominion captivity were armed with several Ferengi disruptor rifles in 2374. (DS9: "The Magnificent Ferengi")

Types of disruptor rifles

Background information

Penny Juday holding a Klingon disruptor rifle.