Not mined, found it on the PTW forum.
Here's the specs on it:
Systema PTW MAX M4A1
G&P handguard cut to pistol length
King Arms PEQ battery box
2000 mah 9.6v battery
Samson Low Profile gas block
steel outer barrel, cut to pistol length, -14mm threaded
Madbull DNTC Compensator
PDI 04 barrel
Magpul trigger guard