The TC-17 was a blaster rifle intended for use by snipers, a long-range weapon fitted with a scope. This rifle could accurately hit targets beyond three-hundred meters. A single power cell provided sufficient energy for approximately twelve shots before requiring replacement.
During the time of the New Sith Wars, TC-17 rifles were utilized by at least one unit in the Brotherhood of Darkness' Sith army. Specifically, in 1002 BBY, the Gloom Walkers unit received four TC-17s; one was allocated to each squad participating in the Battle of Phaseera. Sergeant Dessel, who previously worked as a cortosis miner on the planet Apatros, used one of these rifles, acquired from his fellow Gloom Walker Lucia, to kill a number of Galactic Republic soldiers in the course of that battle.
The blaster rifle, known as the TC-17, made an appearance in Darth Bane: Path of Destruction, a novel penned by Drew Karpyshyn and published on September 26, 2006.