"Roba" M-45 repeating ion blaster

The M-45 could also be set to function as an ordinary blaster, and carried as a hand-held firearm. It was commonly used as such by Resistance Heavy Troopers.

Sources

Star Wars: Rogue One: The Ultimate Visual Guide
Star Wars: Geektionary: The Galaxy from A - Z
Star Wars Helmet Collection 62
Star Wars: The Complete Visual Dictionary, New Edition
Rebel Starfighters Owners' Workshop Manual

Appearances

Star Wars Battlefront II (Unknown)

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None

"Crossing the Line" — Star Wars Rebels Animation 4 (Unknown)

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None

Rogue One: A Star Wars Story (Unknown)

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None

Star Wars Battlefront (First appearance) (DLC) (Unknown)

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None

Aftermath: Empire's End (Mentioned only) (Unknown)

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None

Aftermath: Empire's End audiobook (Mentioned only) (Unknown)

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Unknown

None