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ULTIM033
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.
: Ultimate
ULTIM048
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.
This precision-engineered hop-up bucking with 70° shore hardness is designed for airsoft guns using springs rated M120 to M190. Its higher hardness ensures excellent stability and BB control even under strong air pressure and high muzzle velocities. The bucking features a traditional inner patch, which provides reliable and consistent hop-up effect—ideal for accurate long-range shooting. The package also includes a pressure nub to optimize the contact between the bucking and the BB.
| Color | Black |