Thats a MP40 by top. There is a MP44 by Shoei and they made a AEG version with a M16 mech box.
There is also a MG42 available at
www.airsoftextreme.com.
Check
www.wwiiguns.com, for airsoft they list:
Gewehr 33/40 - $638.00
Mauser Kar 98k [Airsoft Gas Rifle, Shell ejecting] - $372.00
Mauser Kar 98k [Airsoft Gas Rifle] - $480
Maschinengewehr 34 (MG34) [Airsoft] - $3650.00
Maschinengewehr 42 (MG42) [Airsoft Blowback - $1730.00
Maschinengewehr 42 (MG42) [Automatic Electric Gun]- $2580.00
MP40 [Airsoft Electric Gun, Custom built] - $1348.00
MP40 [Airsoft Electric Gun] - $520 (TOP)
MP44 / Sturmgewehr 44 (Stg44) - $1180.00
MP44 Grenadier Set [Airsoft Blowback] - $2315.00
JAC M1918A2 Browning Automatic Rifle (BAR) [Airsoft] - $3350.00
JAC M1918 Browning Browning Automatic Rifle (BAR) [Airsoft] - $2950.00
Lee Enfield Rifle No .4 Mk. I [Bolt-action Airsoft] - $1975.00
M1 Carbine MAXI [Airsoft Gas Gun 8mm] - $252.00
M1 Garand [Airsoft Gas Blowback] - $498.00
SGF M1 Garand [Airsoft Gas Gun] - $605.00
M1903A3 Springfield [Airsoft] - $1295.00
In addition there are:
TM Thompson ~ $325.00
Hudson Gas Grease Gun = not an effective gun at all but looks good
Jac Thompson
LS Sten gun
Smokey's Sten gun
Smokey's M1 garand
Smokeys mp18
Browning High Power (made by Tanaka)
Hudson Tokarev T-33 Asahi Mg34
Asahi mp40
Ktw Springfeild
Ktw Enfeild
Killer Bee Studio PPSH41
Killer Bee Studio M1934a Berretta
Multiple WWII pistols such as:
P-38
Luger
HFC Metal Mauser ~ $125 - can take a carbine kit
1911