The Eurondan sidearm is a weapon used by the Eurondan race.
These pistols are smooth silver-colored devices capable of being held by a human hand. They fire white bursts of relatively slow-moving energy capable of damaging objects as well as organic beings. They also have a stun setting which can be used on organic beings. (SG1: "The DVD Collection 30")
The Eurondan people developed these weapons at some unspecified moment in their past. Security officers were present in the bunker at Euronda where they trained the pistols at SG-1 when they came through the Stargate. However, Alar managed to explain to his people that they were the lost kin from Earth coming to aid them.
When SG-1 discovered the truth about the Eurondan war with the Breeders, their security forces attempted to fight Colonel Jack O'Neill's team but were killed by weapon fire. Alar himself attempted to shoot O'Neill when he used a Remote Flyer against them but was disarmed by Teal'c. (SG1: "The Other Side")