Real Steel Background

The FMG-9 (Folding Machine Gun 9mm) is one of the most unconventional and conceptually daring firearm designs of the modern era, First publicly demonstrated at the SHOT Show in 2008. The core concept was deceptively simple yet revolutionary ? take a Glock 18C select-fire pistol and enclose it within a polymer chassis that, when folded, resembled nothing more than an innocuous rectangular carry box, and when deployed, unfolded into a fully functional tactical personal defense weapon complete with stock, extended barrel, and sighting rail. The FMG-9 was never mass-produced as a real firearm, remaining a proof-of-concept prototype that demonstrated the viability of ultra-concealable PDW configurations built around existing pistol platforms. However, the design captured the imagination of the shooting public and achieved legendary status through its appearance in popular video games, most notably the Call of Duty: Modern Warfare series, where it became an iconic weapon synonymous with covert operations and close-quarters engagements. The FMG-9 concept ? a powerful firearm disguised as an everyday object, deployable in seconds by a field agent ? epitomized the intersection of tactical engineering and cinematic espionage fantasy, cementing its place as one of the most memorable firearm designs never to reach full production.

Product Details

The Maruyama FMG-9 Airsoft GBB brings the legendary folding machine gun concept to life as a gas blowback airsoft platform, built around an integrated Glock G18C pistol housed within a purpose-designed polymer conversion chassis. In its folded state, the entire assembly presents the appearance of nothing more than a small polymer box with a discreet carry handle ? giving no outward indication of the formidable firepower concealed within. Deployment is achieved by lightly activating the bolt mechanism on the left side of the chassis, causing the weapon to unfold smoothly and rapidly into a full tactical configuration, transforming from an unassuming carry case into a ready-to-fire weapon in a matter of seconds. This conversion kit dramatically extends the capabilities of the base pistol, adding a lengthened metal outer barrel threaded with a 14mm CCW muzzle interface for suppressor or tracer unit compatibility, a polymer stock for shouldered firing stability, a polymer handguard with an integrated handstop at the front for positive forward hand placement, and a picatinny top rail for optics and sight mounting. Additional polymer components include a carry handle, a cocking handle, and a dedicated pistol grip, all designed to fold compactly into the chassis when the weapon is returned to its box form. The trigger guard is engineered to auto-fold during the conversion back to box configuration, streamlining the folding sequence without requiring manual intervention.

The Glock G18C pistol at the heart of the FMG-9 kit features a metal slide and metal trigger, and is capable of both semi-automatic and fully automatic fire modes, selectable via the fire selector on the pistol itself. Power is supplied by a metal Glock-pattern gas magazine with a 42-round loading capacity and a polymer magazine base plate, providing sustained firepower for both semi and full-auto engagement. The magazine is broadly compatible across the GBB ecosystem, accepting Umarex (Elite Force) and VFC G17 and G18C style GBB magazines, Maruyama G-style GBB magazines, and RELOAD G17 GBB and CO2 magazines, giving the user extensive flexibility in power source selection. To return the weapon from its deployed state back to the compact box form, the user first presses a small release button located behind the pistol grip to fold the grip inward, then gently opens the small cover on the stock ? taking care not to over-extend it, as excessive force may damage internal components ? before folding the entire assembly back into its rectangular housing.

Internally, the system features an adjustable dial hop-up accessed via the front recoil rod, which can be precisely tuned using a hex key to optimize BB trajectory across different engagement distances and BB weights. The internal architecture incorporates aluminium and steel components throughout, with an enlarged gas cylinder that enhances gas delivery volume for improved consistency and blowback intensity during both semi and full-auto firing cycles. The combination of the folding chassis, select-fire Glock core, broad magazine compatibility, and refined internal engineering makes this one of the most distinctive and conversation-worthy gas blowback airsoft platforms available. Owning the FMG-9 evokes the fantasy of a secret agent carrying concealed, rapidly deployable firepower ? and for airsoft collectors, it represents a classic among classics, a must-have acquisition that stands as a landmark in innovative airsoft design.

Key Features

• Polymer folding chassis system that transforms from an innocuous rectangular carry box into a fully deployed tactical weapon in seconds by activating the left-side bolt release mechanism

• Integrated Glock G18C gas blowback pistol serving as the core firepower platform, featuring a metal slide and metal trigger for authentic weight and tactile response

• Semi-automatic and fully automatic select-fire capability via the Glock fire selector, delivering versatile engagement options from precise single shots to suppressive full-auto bursts

• Extended metal outer barrel with 14mm CCW threading for direct attachment of suppressors, tracer units, or other muzzle accessories

• Polymer stock providing shouldered firing stability for improved accuracy during sustained or rapid-fire engagement

• Polymer handguard with integrated handstop at the front ensuring positive forward hand placement and preventing the support hand from sliding during recoil

• Picatinny top rail running the length of the chassis for mounting red dot sights, holographic optics, or backup iron sights

• Polymer carry handle and polymer cocking handle designed to fold seamlessly into the chassis when the weapon is returned to its box configuration

• Dedicated polymer pistol grip that folds inward via a small rear release button, initiating the conversion sequence back to compact box form

• Auto-folding trigger guard that automatically collapses during the box-conversion process without requiring manual intervention, streamlining the folding sequence

• Metal Glock-pattern gas magazine with 42-round loading capacity and polymer base plate, delivering sustained firepower for both semi and full-auto firing modes

• Broad magazine compatibility accepting Umarex (Elite Force) and VFC G17 and G18C style GBB magazines, Maruyama G-style GBB magazines, and RELOAD G17 GBB and CO2 magazines for extensive power source flexibility

• Adjustable dial hop-up system accessed via the front recoil rod and tuned with a hex key, allowing precise BB trajectory optimization across varying distances and BB weights

• Aluminium and steel internal components providing structural rigidity and long-term durability under the demands of sustained gas blowback operation

• Enlarged gas cylinder enhancing gas delivery volume for improved shot-to-shot consistency and more pronounced blowback recoil intensity

• Two-stage folding procedure for box conversion ? press the rear grip release button to fold the pistol grip, then gently open the stock cover without over-extension before folding the complete assembly into its rectangular housing

• Faithful realization of the legendary FMG-9 folding machine gun concept, delivering the secret-agent fantasy of concealed, rapidly deployable firepower in a gas blowback airsoft platform

• A landmark design in innovative airsoft engineering and a classic among classics that stands as an essential acquisition for serious airsoft collectors and enthusiasts