Folding Machine Gun

The Folding Machine Gun entry should be treated as a prototype concept rather than a normal belt-fed machine gun. The ARES FMG was a 9 x 19 mm folding submachine gun intended to collapse into a box-like shape for concealment, and Magpul later demonstrated the FMG9 folding machine-gun concept. These systems are relevant because they explore covert carry and close-protection requirements, not because they became large-scale infantry weapons.

The defining design feature is the folding frame. A pistol-caliber firing mechanism is housed in a package that can be carried discreetly and then opened into a more controllable submachine-gun layout with stock and grip. Magpul's FMG9 materials present this as a folding 9 mm weapon concept, while ARES FMG references describe an earlier concealment-oriented design. The compromise is clear: concealability improves, but durability, ergonomics, sighting, and legal or operational acceptance become harder.

Operationally, folding submachine guns would be most useful for close protection, undercover security, or emergency defensive fire where a visible long gun is undesirable. Available sourcing supports prototype and concept status rather than broad service adoption. A high-quality page should therefore avoid overstating deployment and explain why the idea is interesting: it trades conventional weapon handling for concealability in a very narrow mission set.