So I love the old StarGate series and one of the icons of the series was the use of the FN P90 bull pup machine pistol with its 50 round transparent plastic magazine on the top of the barrel, just popping off the bad Egyptian dudes by the dozens.
The reality was that this French sponsored weapon was not just a prop. Developed in the 80’s as better than a pistol, sub machine gun or rifle for vehicle crews and security forces . Something with the ability to penetrate bullet proof vests, carry a lot of rounds, but not load the soldier down or make a big visual impression.
The core of this is the 5.7×28 mm round…a center fire 22 pistol round. With the ability to accurately hit and penetrate at moderate range. A 9in (ish) barrel in a bull pup kept the weapon short. The plastic magazine was bizarre but worked, stacking the rounds sideways with a ramp/pivot to feed the rounds into the chamber. It doesn’t sound like a great idea but apparently it was engineered well and does the job reliably while providing 50 rounds.
The 5.7×28 round has started to make an impact with the current interest in self defense and concealed carry. The Ruger 57, the FN 57 pistol both are modest successes and deservedly so. Now KelTec kicked it up a whole lot with this 5.7x28mm Maxi Pistol…really a bit of a competitor to the P90 which may be out of print now. It is a wild take on what is supposed to be a personal ‘side arm’ but it certainly makes an impression.