I built this rifle 2 years ago and it has been one of my favorite weapons to run on the field both indoor and outdoor. 1.1 Joule / 39-41 Rps (depends on battery) HMU for shooting video Internals: EMG x Retro Arms CZ Billet CNC 8mm V2 Shell Siegetek DSG 20.8:1 GATE TITAN V2 Guarder Enhanced V2 Tappet Plate Prometheus Shims ASG AntiReversal Latch Matrix Gearbox Springs Spring: SP-150 UMBRELLA ARMORY Enhanced Nozzle Maxx Aluminum Speed Trigger UMBRELLA ARMORY Piston and Piston Head Assembly Umbrella 8mm Bearings ASG BOOST 30k Motor Modify V2 Cylinder Head SHS Steel Cylinder UMBRELLA PROMETHEUS 6.03 Inner Barrel with R-Hop Inner Barrel Assembly Stabilizer Spring Spacers Externals: Upper/Lower Reciever and stock mount from SSG1 G&P CNC Aluminum Outer Barrel 6.5” M4 EMG F-1 Firearms Mag Release ANGEL CUSTOMS charging Handle APS Six Position Metal Buffer Tube PTS EPM Stock G&P MOTS Phantom Handguard PTS Fortis Shift Grip Extra Externals: Tracer Unit: $40 OLight $70 Red Dot: $10 Red Dot Riser:$5