more photos as requested.
basically started out as a dboys spr, top rail and ejection port cover removed, rear body built up using aluminium and body filler.
fake bolt fitted and mag latch manufactured, mag released by pulling knurled bolt at rear.
hop wise its the m4 hop inverted and fitted with a fixed nub , the silver tube behind the hop operates the bb catch on the p90 mag.
the battery fits in a cut out in the lower ris and covered by the rail cover