DSG gear box drop in Part list Krytac Licensed CMC Flat Trigger Assembly Krytac Complete Switch Assembly w/ MOSFET for Trident Series Airsoft AEGs wired to deans Ajax piston head ICS Oversized Aluminum Cylinder Head Matrix Full Steel Teeth Polycarbonate Piston Matrix Irregular Pitch Airsoft AEG Upgrade Spring (Power: M140 450~550 FPS) DSG shooting around 320 FPS ASG Ultimate Upgrade Tappet Plate ASG Ultimate Boost 30k Custom Motor (Type: Long Axle) SHS Steel Double Sector Gear with Specialized Tappet Plate - Version 2 Matrix Custom Reinforced 8mm M4/M16 Gearbox with 8mm Bearings and QD Spring Guide