Lambda B&T GHM9 MP9 Magazine Version BK/DE 
 
B&T Liscensed GHM9-G 
1913 Picatinny 20MM Rail (NOT Coming with Collapsible Stock) 
Coming with Flash Hider 
Coming with MP9 48rds Gas Magazine 
Pistol Grip are same data with normal GBBR, you can replace it easily