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Caliber | 9 x 19 mm |
| Weight (empty) | 2.9 kg | |
| Length | 580 mm | |
| Length (with folded stock) | 350 mm | |
| Barrel length | 130 mm | |
| Muzzle velocity | 400 m/s | |
| Cyclic rate of fire | 850 rpm | |
| Practical rate of fire | 40 – 150 rpm | |
| Magazine capacity | 30, 50 rounds | |
| Sighting range | 200 m | |
| Range of effective fire | 50 m |
The Spectre M4 submachine gun was developed in Italy by Roberto Teppa and Claudio Gritti in the mid 1980s. It was produced by SITES factory. This weapon was designed primarily for close combat. Production ceased in 1997. Currently this submachine gun is in service with Italy, Switzerland and possibly some other countries. It is mainly used by law enforcement forces.
It is a blowback operated weapon, which fires from the closed bolt. It is chambered for 9 x 19 mm ammunition. The receiver is made of stamped steel. Some sources claim that the Spectre M4 has an effective range of only 50 m.
This SMG has a double action trigger group, without manual safety. The Spectre can be safely carried with loaded chamber and fired immediately. An ambidextrous cocking handle is located on top of the receiver, so the weapon can cocked using either hand.
The Spectre M4 SMG is fed from 30- or 50-round capacity magazines. It is worth mentioning that civilian versions of this weapon are available with 5-, 10- or 15- round magazines.