About Real Guns
The Heckler & Koch MP5 (German: Maschinenpistole 5) is a 9x19mm Parabellum submachine gun, developed in the 1960s by a team of engineers from the German small arms manufacturer Heckler & Koch. There are over 100 variants and clones of the MP5, including some semi-automatic versions.
The MP5 is one of the most widely used submachine guns in the world, having been adopted by 40 nations and numerous military, law enforcement, intelligence, and security organizations.

Umarex (VFC) MP5K Early Type Gen 2 Airsoft GBB SMG
1/1 Scale High Power Assembled Gas Powered Airsoft GBB
Semi/ Burst & Fully Automatic Shotting Mode

Metal Upper Receiver
Polyner Receiver Grip
Metal Barrel
Polymer Foregrip
Metal Fixed Front and adjustable Rear Sights
30rds Loading Capacity metal Gas Magazine
The new group is a full set, quick replaceable fire control group with a newly designed disconnection set, hammer, and hammer latch. 
Its function and strip down are similar to the real steel counterpart.

Adjustable Hop-Up System
New bolt group design with a built-in floating buffer with an enhanced nozzle assembly
The bolt carrier combines a steel heavy buffer and a two-stage recoil spring / steel recoil spring guide rod set for great recoil impulses
The new re-designed chamber and bullet feed system is made from reinforced polymer material combing with a redesigned magazine makes the gun much more reliable.
Inside it uses the new version floating gas outlet while still keeps the last round stopping feature
This new design is much more durable and highly increases the gas efficiency.
Sling mount can be installed with any single, 2- or 3- point tactical sling