AEG Progressive Spring M125 by ASG ULTIMATE with orange marking.
Color-coded stiffness for easy identification.
Ideal for airsoft gun upgrades.
Made from military-grade SiCr spring steel.
Progressive winding for smoother startup and reduced strain on gears and motor.
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The spring is a key component of the gearbox as its strength—combined with air seal quality—determines the gun's overall performance. Low-quality springs may offer higher-than-rated output at first, but quickly lose tension, shorten, or even break—especially when stored compressed or used with pre-cocking systems.
The ULTIMATE upgrade spring from ASG is engineered for maximum consistency and durability. Manufactured from high-quality SiCr spring steel (silicon-chrome), it meets military specs and withstands wear, even under high rates of fire.
The progressive winding design starts softer and builds up, reducing stress on the gearbox and motor. Both ends are closed and ground for stability and a secure fit. Each spring is factory pre-tensioned to minimize initial power drop. The black zinc coating protects against corrosion without affecting performance.
When installing a progressive spring, the tighter-wound end (with denser coils) goes onto the spring guide. The colored-marked end by ASG ULTIMATE goes into the piston.
| Model | Stiffness (N/mm) | Color Code | Outer Diameter (OD) | Inner Diameter (ID) | Length (mm) |
|---|---|---|---|---|---|
| M95 | 0.447 | Blue | 14 mm | 11 mm | 176 mm |
| M105 | 0.467 | Green | 14 mm | 11 mm | 189 mm |
| M115 | 0.519 | Yellow | 14 mm | 11 mm | 188 mm |
| M125 | 0.826 | Orange | 14 mm | 11 mm | 168 mm |
| M135 | 0.943 | Red | 14 mm | 11 mm | 178 mm |
Specific References
Guarder Progressive Spring for AEG with a stiffness of SP110 (M110).
Offers performance of 104 - 110 m/s.
Made from tempered Si-Cr wire.
Progressive (irregular) winding of the spring eases compression in the initial phase.
Performance consistency even after thousands of shots.
Fits standard TM AEG gearboxes and manual SVDs.
AEG Progressive Spring M115 by ASG ULTIMATE with yellow marking.
Color-coded stiffness for easy identification.
Ideal for airsoft gun upgrades.
Made from military-grade SiCr spring steel.
Progressive winding for smoother startup and reduced strain on gears and motor.
Where to with an empty magazine? Into the dump pouch, of course! The airsoft magazine pouch is a practical tool for better organization of ammunition and helps to reload faster.
Guarder Progressive Spring for AEG with a stiffness of SP120 (M120).
Offers performance of 113 - 122 m/s.
Made from tempered Si-Cr wire.
Progressive (irregular) winding of the spring eases compression in the initial phase.
Performance consistency even after thousands of shots.
Fits standard TM AEG gearboxes and manual SVDs.
Guarder Progressive Spring for AEG with a stiffness of SP100 (M100).
Offers performance of 98 - 104 m/s.
Made from tempered Si-Cr wire.
Progressive (irregular) winding of the spring eases compression in the initial phase.
Performance consistency even after thousands of shots.
Fits standard TM AEG gearboxes and manual SVDs.
AEG PIANO Spring with Progressive Coil by Action Army – Strength of M120.
Suitable for airsoft gun upgrades.
Made from spring steel Piano Wire.
Progressive winding for gentler startup and reduced stress on gears and motor.
Guarder Progressive Spring for AEG with a stiffness of SP140 (M140).
Offers performance of 134 - 143 m/s.
Made from tempered Si-Cr wire.
Progressive (irregular) winding of the spring eases compression in the initial phase.
Performance consistency even after thousands of shots.
Fits standard TM AEG gearboxes and manual SVDs.
The ANAREUS winter camouflage suit is the right companion for snowy environments and is therefore ideal for tactical operations or hunting expeditions in snowy terrain. Not only will you look good in it, but it will also protect you well from the elements. Generation 2 also brings several improvements!
Retro Arms has come out with another piece that helps you build an upgraded beast exactly to your specifications.
A quality spring of standard length with progressive winding for AEG gearboxes, rated at M120.
Progressive (variable) winding makes the spring easier to compress.
Made from valve wire alloyed with silicon and chromium (SiCr).
ETU unit Scylla V2 by JeffTron with cabling output to the stock.
Optical and magnetic sensors for maximum reliability.
Wireless setup via an app for iOS and Android.
Adjustable trigger sensitivity and firing speed.
Various firing modes (pre-cocking, binary trigger, burst, and more).
Compatible with TM standard V2 gearboxes.
Easy installation and high reliability.
AEG Progressive Spring M135 by ASG ULTIMATE with red marking.
Color-coded stiffness for easy identification.
Ideal for airsoft gun upgrades.
Made from military-grade SiCr spring steel.
Progressive winding for smoother startup and reduced strain on gears and motor.
A modular pouch, which thanks to its simple but original construction is fit for carrying a pistol magazine. It can hold a single magazine and has been sewn from durable nylon material. The inside features a special safeguard made of polymer that prevents the magazine from falling out.
Where to with an empty magazine? Into the dump pouch, of course! The airsoft magazine pouch is a practical tool for better organization of ammunition and helps to reload faster.
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