Fleming Firearms HK51 (MC51) - "Full Auto Flashbang Dispenser"
Best described by Ian McCollum (aka Gun Jesus) from Forgotten Weapons as a "Full Auto Flashbang Dispenser".
HK51 is an unofficial Heckler & Koch firearm that was designed by an American gunsmith Bill Fleming in the late 1980s, by utilising existing G3 and HK91 parts. It's invention was in direct response to the British SAS and SBS Special Forces request for a compact "Sub-Machine Gun" sized firearm that can still fire the full powered cartridge. Although it did saw very limited service and adopted as the MC51 (Machine Carbine 51), the firearm was very quickly replaced by the HK53 due to the sheer amount of concussion and muzzle blast it produces. The HK51 still sees itself as a fun range toy by many gun enthusiasts. Clone version are also currently being produced by PTR Industries under the name "PTR 91 PDWR"
In a nutshell it's a cutdown G3, or in the otherway around a dummy T H I C C MP5.
Other Attachments: X-Products Drum Magazine, MFI HK Optic Rail, SureFire 628 Pressure + Switch Flashlight handguard.
Production Period: 20th Oct 2024 - 3rd Nov 2024
Modelled in Blender, Textured in Substance Painter
Tris:
Gun + 20 rnd Mag + Optic Rail - 51,072
SureFire 628 Handguard Flashlight - 5,264
50 rnd Drum Mag - 7,584
Available for purchase on CGTrader:
https://www.cgtrader.com/3d-models/military/gun/fleming-firearms-hk51-pdw-carbine-pack
HK51 (aka the Flashbang Dispenser, Dummy T H I C C MP5).
HK51 was designed by American gunsmith Bill Flemings from existing H&K G3 and HK91 parts.
Features an 8.3 inch barrel, and fires the full powered 7.62x51mm NATO, or .308 Winchester round.
Uses standard MP5 handguards, so it can accept any handguard accessories designed for the MP5.
Receiver markings. The Trigger Group can be easily swapped out. I modelled mine based on the "Navy" Ambi Trigger Group.
Since the G3 rifle was modified, Flemings did put his own markings over the original German markings.
MFI HK Optic Rail clamped on the receiver.
Charging handle...
You better slap that!
G3A4 collapsing buttstock.
Standard G3 flash hider... Doesn't exactly "hide" the muzzle flash due to the excessive fireball the gun produces.
Handguards
Aim Down Sight
Wireframe
SureFire 628 Pressure + Switch Handguard.
X-Products Drum Mags.
Sketchfab Render
References