TM M4 NGRS was the base gun it’s had a mosfet put in then had some bits added to it to make it look like another rifle.

only needs a couple of more bits and then it will look like another rifle so makes a good start. 
 

if you add all the bits up your looking at over £1550 new so grab yourself a bargain. 

comes with 
 
Angry gun L119A2 front rail.
 
PTS pistol grip. 
 
converted magpul stock to take the battery from daves customs.
 
Angry Gun surefire replica suppressor (this is the usb charged tracer version)
 
genuine manta suppressor cover.
 
Somogear LA15 
 
replica surefire M600 with offset mount 
 
Magpul AFG grip 
 
replica unity scope mounts 
 
replica Aimpoint and magnifier 
 
rail mounted and QD mount

Angry gun charging handle catch for L119A2 

Angry gun ambidextrous mag realase
 
6 x PTS mags 
 
2 batteries and charger (not shown in pics but can be provided)