This is a VFC MP7 converted to HPA using Tony Chen's kit. Here is a full parts list. Boneyard VFC MP7, $220 - https://www.evike.com/products/34970/ Polarstar F2, V2 (M4/M16) #1 Nozzle, Blemished, $400 - https://polarstarairsoft.com/products/f2%E2%84%A2-hpa-conversion-kit-blemished Angel Custom 1500 Round Firestorm Drum, $63 - https://www.evike.com/products/44072/ CNC Hop Up Arm, $33 - https://www.gsi2003.com/product-page/gsi-metal-hop-up-arms-for-vfc-umarex-mp7a1-aeg Maple Leaf Bucking (70), $10 Printed HPA Conversion kit, $20 - https://cults3d.com/en/3d-model/gadget/vfc-mp7-aeg-hpa-conversion-kit-using-p-jack-or-f2 Amped IGL, HPA Grip Line, $24 ACETECH-Predator L- Tracer Unit, $87 Titan Digital Charger, $34 - https://www.amazon.com/gp/product/B084MLR11D/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 Holy Warrior, S1 EXPS3 Holo Sight, $116 - https://opptactical.com/en/home/18-71-holy-warrior-s1-exps3-nv-fucntion-558-red-dot-sight-holographic-sight-rifle-scope-hunting-airsoft-with-original-logo-sign-mark.html#/11-color-black 2X VFC 110-Rd Magazine, $70 - https://www.evike.com/products/91781/ Matrix Aluminum 12mm Positive to 14mm Adapter, $18 - https://www.evike.com/products/16096/