APS. (Hakkotsu) APM40 M40A3 Hard Piston Nylon Fiber Rifle 5inch Mid-Length Outer Barrel Assemble

5inch Mid-Length Outer Barrel Assemble  CNC Durable Enhanced Aluminum Construction  Hard Coat Anodize Surface  Suitable for WA M4 Series Airsoft Gas Blow Back GBB Rifle  Design for PTS MOE Mid-Length Hand Guard  Includes 290mm Outer barrel & Dummy Gas Tube  Adaptive End: 14mm Negative

DYTAC CNC Stock Tube Assembly with Battery Wire Extraction (Light Weight)  CNC Lightweight Aluminum Construction  6 position Stock tube  With Battery Wire Extraction  Suitable for Tokyo Marui M4 Series Airsoft AEG Rifle  Matt Black Finish look very realistic

Unlike Japan

let me share a little more information on it

New loading BB system with wind-up function (15 rounds Loading Capacity)

APS. (Hakkotsu) APM40 M40A3 Hard Piston Nylon Fiber Rifle 5inch Mid-Length Outer Barrel AssembleThis is a replacment piston for APM40 Spring Action Sniper rifle used. It is made of reinforced POM and standard comes with metal sear. A. P. S. (Hakkotsu) APM40 M40A3 Hard Piston Reinforced POM Construction Suitable for A. P. S. (Hakkotsu) APM40 Spring Action Sniper rifle Enhanced part for power upgrade user Comes with metal sear Length: 108mm