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This airsoft requires a machined carbon fiber pipe.
You can either machine it yourself or use a cutting service near you.

The engine is recommended to be a reaper due to simplified wiring and the fact that full is not implemented.
Inferno can also be used, but requires a universal kit or premium board.
Some 3d printed parts require welding as shown in the accompanying photos.
They also need to be sanded to ensure smooth assembly.

Parts List
Machined carbon fiber pipe
3Dprinting parts
HPA engine (reaper or inferno for mtw)
Retro Arms v2 Chamber
m4 mag chatch
Retro Arms v2 Chamber
insert nut(m4 Length 3mm, Diameter 5.5mm )
m4 screws of appropriate length
micro switch ss-5(https://www.amazon.co.jp/-/en/Omron-SS-5-F-Ultra-Compact-Switch-Button/dp/B0062WQIQU)andProper wiring

Originality of the Model

The author declares that this work is their personally shared model

Original creator:
kanehatimk2

This model is licensed under the following terms:

No Copyright.

Models(18)

  • pipe_hpa_Ver.2_v3_pipe_hpa_Ver.2_v3_Component13_1_carbon_tubu_1_carbon_tubu.stl

    68.64 KB

    2025-06-13

  • pipe_hpa_Ver.2_v3_pipe_hpa_Ver.2_v3_Component13_1_engine_lock_1_upper.stl

    14.24 KB

    2025-06-13

  • pipe_hpa_Ver.2_v3_pipe_hpa_Ver.2_v3_Component13_1_engine_lock_1_lower.stl

    99.89 KB

    2025-06-13

  • pipe_hpa_Ver.2_v3_pipe_hpa_Ver.2_v3_Component13_1_front_1_front01.stl

    43.93 KB

    2025-06-13

  • pipe_hpa_Ver.2_v3_pipe_hpa_Ver.2_v3_Component13_1_front_1_fore_grip.stl

    11.02 KB

    2025-06-13

  • pipe_hpa_Ver.2_v3_pipe_hpa_Ver.2_v3_Component13_1_front_1_grip_rail.stl

    9.36 KB

    2025-06-13

  • pipe_hpa_Ver.2_v3_pipe_hpa_Ver.2_v3_Component13_1_muzzle_1_muzzle.stl

    82.80 KB

    2025-06-13

  • pipe_hpa_Ver.2_v3_pipe_hpa_Ver.2_v3_Component13_1_front_1_trigger_gard.stl

    7.31 KB

    2025-06-13

  • pipe_hpa_Ver.2_v3_pipe_hpa_Ver.2_v3_Component13_1_muzzle_1_top_rail.stl

    15.32 KB

    2025-06-13

  • pipe_hpa_Ver.2_v3_pipe_hpa_Ver.2_v3_Component13_1_stock_1_stock01.stl

    19.13 KB

    2025-06-13

  • pipe_hpa_Ver.2_v3_pipe_hpa_Ver.2_v3_Component13_1_front_1_front03.stl

    23.62 KB

    2025-06-13

  • pipe_hpa_Ver.2_v3_pipe_hpa_Ver.2_v3_Component13_1_front_1_front02.stl

    6.04 KB

    2025-06-13

  • pipe_hpa_Ver.2_v3_pipe_hpa_Ver.2_v3_Component13_1_switch_box_1_trigger_base.stl

    16.68 KB

    2025-06-13

  • pipe_hpa_Ver.2_v3_pipe_hpa_Ver.2_v3_Component13_1_stock_1_stock02.stl

    13.07 KB

    2025-06-13

  • pipe_hpa_Ver.2_v3_pipe_hpa_Ver.2_v3_Component13_1_switch_box_1_switch_box_L.stl

    18.34 KB

    2025-06-13

  • pipe_hpa_Ver.2_v3_pipe_hpa_Ver.2_v3_Component13_1_switch_box_1_switch_box_R.stl

    21.18 KB

    2025-06-13

  • step.zip

    651.08 KB

    2025-06-13

  • stl.zip

    122.96 KB

    2025-06-13

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