Here is my oldskool UKSF setup, both ics and have been absolutely brilliant, I have owned from new. The mp5A2 is completely unmodified, comes with the g&p cree torch fore grip, unfortunately no torch and original fore grip (see picture). 
 

the sd6 is in near perfect condition front wired (large battery space deans)  has had upgraded motor, hop rubber, barrel and tracer in the silencer. shoots like a laser (literally in low light) an extra A2 stock also comes with this. For any info please feel free to ask I’m no tech but I’ll answer as best as I can. 
 

All metal where they should be, polymer in the right places too.