-SRU Carbine Kit in Bullpup design which turns a normal G series GBB into a bullpup carbine
-Custom by Flintlock Workshop which install the internal part of WE G18C lower frame (original trigger, safety will included)
-The SRU Slide kit and magazine in the photo are not included
-The original G18C lower frame is not included
-User only need to install a WE G18C / G35 Slide Set and magazines for using this ready set