The TR-120 was a magnetic pulse rifle that was developed at the same time as the TR-116 for use against the Jem'Hadar. It fired adhesive projectiles that would deliver a non-lethal shock that would incapacitate the Jem'Hadar soldier for an hour. The rifle was practically silent and had no muzzle flash or other visible effect, and thus was ideal for stealth combat situations.

In 2379, the crew of the USS Enterprise used TR-120 rifles, as well as TR-116 rifles, against the Tezwans during their peacekeeping duties on Tezwa. (TNG novel: A Time to Heal)

Federation Starfleet hand-held weapons
Energy weapons	type-1 phaser/hand phaser	Sestra phaser I • Atalskes phaser III • Sestra phaser IB • mark V personal phaser
	type-2 phaser/phaser pistol	Sestra phaser II • Atalskes phaser IV • Sestra phaser IIB • mark VI battle phaser • phaser (alternate reality)
	type-3 phaser/phaser rifle	mark VII phaser rifle • compression phaser rifle • enhanced compression rifle • phaser rifle (alternate reality)
	miscellaneous	assault rifle • infinity modulator • isomagnetic disintegrator • laser pistol • laser rifle • neural disruptor • phase pistol • sniper rifle
Projectile weapons		compound grenade launcher • photon burst • quantum burst • TR-116 • TR-120