The TR-116 Projectile Rifle is a prototype weapon developed by the Federation for situations where conventional energy weapons might be rendered useless by dampening fields or other countermeasures. It is essentially a conventional rifle, but with a rather futuristic visual style. It is introduced in the Star Trek: Deep Space Nine episode "Field of Fire", where it is used in conjunction with a micro-transporter and a visual scanner headpiece to create a very potent sniper rifle. With the scanner, the shooter can precisely target people hundreds of meters away and through solid matter with no difficulty. Using the transporter attached to the barrel, the slug can then be transported at full velocity, materializing at point-blank range. It can be theorized that the weapon was designed with some thought put into combat with Borg drones, whose adaptive ablative shielding renders particle weapons useless after a few shots, due to the Borg absorbing the energy into their shields, something that they cannot do with projectile weapons.