APS. ASR Receiver Set for No.2 Hybird Gearbox (Black) Tech and in this case

and in this case

- Non-slip ABS Wood Texture Grip Cover

4V Large type Rechargeable battery  Utilize 6mm Plastic Bullet

etc  Additional space on both for mount Mil-spec Picatinny Rails on (Not Include)  Equipped with Heat Shield  Suitable for Systema PTW Profile (1 1/4Inch / 18) Series Airsoft Rifle  Length (Rail): 345 mm  NOTES: Modification & Self-Installation is required

Functional slide lock

APS. ASR Receiver Set for No.2 Hybird Gearbox (Black) Tech and in this caseA. P. S. ASR Receiver Set for No. 2 Hybird Gearbox (Black) Aluminum Die Castng Construction Suitable for M4 M16 Series Airsoft Electric Gun AEG Rifle Package Include Steel Dust Cover, Charging Handle, Recever Pin Set, Forward Assist Knob, magazine catch, Bolt Catch