Stammershot

A young Atreides engineer with a very bad stutter was routinely ridiculed by his fellows stationed at The Aegis. To reduce his stutter, he began using semuta to help calm his mind. He became an addict, hopelessly enthralled to his semuta supplier, a Harkonnen agent.

This specially modified Unique rifle fires in a three-round burst, with the final dart in the burst dealing additional damage. It was the last thing many heard at The Aegis when the young man turned it upon his once-comrades and then himself.