The TAC-1 is a submachine gun chambered in 9 x 19 mm Parabellum or .45 ACP. It is ergonomically similar to the Thompson submachine gun and uses a screw-delayed blowback operation found on Mikhail Kalashnikov's submachine gun prototype.
The TAC-1 is an open bolt, blowback-operated firearm that uses a screw-delayed blowback operation that was first used on Mikhail Kalashnikov's submachine gun prototype.
The weapon has a grip safety as well as a safety lever on the left side of the receiver, over the pistol grip. The standard version also has a combination lock above the trigger near the safety lever. In the selective-fire variants, this safety lever doubles as a fire selector. The magazine release is found behind the magazine well, and the charging knob is on the left side of the upper receiver.
The stock, pistol grip, and foregrip of the TAC-1 are wooden.
Weapons with no combination lock bear the designation TAC-1M.
As the weapon was originally marketed towards law enforcement, the earliest models had select-fire capability.
The XF-7 variant is identical, internally, to the standard TAC-1, but has a plastic stock, foregrip and pistol grip and a folding stock.
- Long, Duncan (1986). Assault Pistols, Rifles, and Submachineguns. Boulder, Colorado: Paladin Press. pp. 18–19. ISBN 0-87364-353-4.