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RetroArms M4 / AR15 trigger stop spring is a replacement spring for the V2 gearbox trigger mechanism, commonly used in M4 / AR15 AEGs. Made from spring steel, it is a practical spare part for servicing, repairs or replacing a worn, damaged or lost original spring.

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6701
RetroArms CNC Trigger for AEG and HPA M4 / AR15 and SR-25 airsoft rifles, Type A design is CNC machined from EN AW 7075 aircraft-grade aluminium, providing low weight and high durability. The trigger is designed according to the Tokyo Marui standard and allows installation in most V2 and V2.5 gearboxes without modifications.
6704
RetroArms CNC Trigger for AEG and HPA M4 / AR15 and SR-25 airsoft rifles, Type D design is CNC machined from EN AW 7075 aircraft-grade aluminium, providing low weight and high durability. The trigger is designed according to the Tokyo Marui standard and allows installation in most V2 and V2.5 gearboxes without modifications.
6705
RetroArms CNC Trigger for AEG and HPA M4 / AR15 and SR-25 airsoft rifles, Type E design is CNC machined from EN AW 7075 aircraft-grade aluminium, providing low weight and high durability. The trigger is designed according to the Tokyo Marui standard and allows installation in most V2 and V2.5 gearboxes without modifications.
6703
RetroArms CNC Trigger for AEG and HPA M4 / AR15 and SR-25 airsoft rifles, Type C design is CNC machined from EN AW 7075 aircraft-grade aluminium, providing low weight and high durability. The trigger is designed according to the Tokyo Marui standard and allows installation in most V2 and V2.5 gearboxes without modifications.
The RetroArms trigger stop spring is a small replacement part designed for V2 gearboxes in M4 / AR15 AEG airsoft guns. The spring is part of the trigger stop mechanism and is useful during gearbox servicing as a replacement for the original spring if it becomes damaged, deformed or lost during disassembly. It is made from spring steel, a suitable material for a flexible component subjected to repeated mechanical stress. Due to differences in gearbox and trigger mechanism designs between manufacturers, we recommend checking compatibility with the specific build before installation.
The spring is designed for the V2 gearbox trigger mechanism commonly used in M4 / AR15 electric airsoft guns.
It is made from spring steel, suitable for small mechanical components subjected to repeated flexing and mechanical stress.
Suitable as a replacement for a damaged, deformed or lost original spring when repairing the trigger mechanism.
Primarily designed for M4 / AR15 AEG airsoft guns with a V2 gearbox.
This small spring can easily be damaged or lost when disassembling the gearbox, making it a useful spare part for servicing and maintenance.
It is designed for V2 gearboxes, commonly used in M4 / AR15 platform AEG airsoft guns.
Replacement is recommended if the original spring is damaged, deformed or lost, for example during gearbox servicing or disassembly.
It is designed for V2 gearboxes, but individual manufacturers may use different dimensions and manufacturing tolerances. We therefore recommend checking compatibility before installation in gearboxes from other brands.
| Variants | M4 / AR15 |
| Color | Silver |
| Body/receiver material | Metal |
| Gearbox version | V2 |