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GPMG / FN MAG58 / 240B 50 Round Drum Magazine Airsoft Conversion

Assembly.png GPMG / FN MAG58 / 240B 50 Round Drum Magazine Airsoft Conversion
IMG_20190708_193038_603.jpg GPMG / FN MAG58 / 240B 50 Round Drum Magazine Airsoft Conversion
Box_Mag_Feed_Wheel.stl GPMG / FN MAG58 / 240B 50 Round Drum Magazine Airsoft Conversion
Box_Mag_Inner_Sleeve.stl GPMG / FN MAG58 / 240B 50 Round Drum Magazine Airsoft Conversion
Box_Mag_Shell_-_No_Mount.stl GPMG / FN MAG58 / 240B 50 Round Drum Magazine Airsoft Conversion
Hopup_Adapter.stl GPMG / FN MAG58 / 240B 50 Round Drum Magazine Airsoft Conversion
Box_Mag_Insert.stl GPMG / FN MAG58 / 240B 50 Round Drum Magazine Airsoft Conversion

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Creation quality: 5.0/5 (1 vote)
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  • 3.5k views
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STL Folder details Close
  • Box_Mag_Feed_Wheel.stl
  • Box_Mag_Inner_Sleeve.stl
  • Box_Mag_Insert.stl
  • Box_Mag_Shell_-_No_Mount.stl
  • Hopup_Adapter.stl

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Publication date 2021-08-22 at 23:03
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Published to Thingiverse on: 2020-02-28 at 15:54
Design number 501278
GooseWerksShop

GooseWerksShop

3D printer file info

3D model description

This is a drop-in auto winding system for a 50 round drum magazine for a FN MAG58, 240 Bravo, GPMG etc.

The following parts are needed:
-Insert - Needs spring tubing to be added to the output tube that feeds into the MAG's hopup chamber.
-Hop Up Chamber - Modeled exactly after the factory design, connects to the spring tubing.
-Feed Wheel - Screws into the top of a servo (recommend metal gear servo & high torque rated for 3S lipo)
-Inner Sleeve - This slides into the real steel box magazine and allows you to glue / adhere the insert to the inner sleeve, not the box mag, making this a TRUE drop in system.

This system has worked extremely well at events and airsoft game days. I used a DC PWM motor speed controller and ran the servo in series with the gearbox motor wiring so that when the motor in the gearbox spun, the box mag servo will turn and feed the replica. You need a speed controller to "tune" the feed rate to your gearbox cycling rate. I tuned it to only misfire every 15 shots or so.

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