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ZERO-SHOCK Piston [FPS SOFTAIR]

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FPS SOFTAIR  PM03 | Available
Our price*: $10.72

The last price before promotion: $15.31

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  • Technical data

    Manufacturer: FPS SOFTAIR
    Code: PM03
    EAN 5904420006688
    Weight 15 g

  • Reviews

    • - 04.05.2026 wrote:
      The FPS Softair ZERO-SHOCK Piston is a well-known internal upgrade part designed for airsoft AEG gearboxes, aimed at improving durability, efficiency, and long-term reliability. Its main feature is the patented “zero-shock” system, which uses a reinforced technopolymer body combined with a full metal rack. This design helps absorb impact forces during cycling, reducing stress on both the piston and gearbox shell.

      In practical use, the piston feels lightweight yet sturdy, which contributes to a faster and smoother cycle rate when paired with a properly tuned setup. The metal teeth provide strong engagement with the sector gear, making it suitable for medium to high-stress builds. Users often choose it for its balance between reduced weight and improved shock absorption compared to standard pistons.

      During gameplay, it delivers consistent performance and good compression stability when matched with quality airseal components. However, as with most internal upgrades, its real benefit depends heavily on correct gearbox tuning and proper installation.

      Overall, the ZERO-SHOCK piston is a reliable, well-engineered upgrade that improves durability and cycling smoothness, making it a solid choice for both intermediate and advanced AEG builds focused on consistency and longevity.
      Opinion rating: -1
    • - 04.08.2025 wrote:
      The build quality of the Zero Shock piston is excellent. I installed it in my custom AEG build running 13:1 gears, and it fits snugly without any wobble or alignment issues. It performs reliably under high-speed setups, and the material feels durable and well-machined. So far, it's holding up great after several thousand rounds. I’m confident it will last long and continue delivering consistent performance. Highly recommended for anyone upgrading or building a high-speed airsoft setup.
      Opinion rating: 0
    • - 12.12.2023 wrote:
      Been using Fps Softair gearbox parts for years in my replicas and they are awesome and super durable at a good price.
      Durable plastic , good quality steel teeth and at a good price
      Nothing to complain about
      Opinion rating: 2
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FPS is proud to present the first ZERO-SHOCK lightened piston with 100% Made in Italy technopolymer body and full metal teeth.

This system patented by Fps allows to attenuate the stresses that the rack transmits to the piston body and it makes the assembly enormously more resistant and reliable than a normal piston.

For the material of the piston was chosen a reinforced technopolymer with added elastomer with high mechanical performances and a very low friction coefficient.
The rack has been manufactured using MIM (Metal Injection Molding) technology because this production process guarantees dimensional precision and strength equal to those of solid machining.
The rack is presented with the second missing tooth and with the third already lowered by 3 tenths of a millimeter because this configuration predisposes the piston itself for a correct angle of engagement (AOE) and makes it suitable for high speed.
The type of metal injected is SAE 4650 + HRC38-42 hardening treatment which is currently considered the best material on the market for this type of use.
The sliding guides are designed to minimize friction and retain the lubricant for a long period of time.
The rack seat is decentralized to favor the coupling between the piston teeth and those of the sector gear.
The longitudinal reinforcements at the sides of the teeth increase the robustness of the piston and avoid contact of the rack with the inner wall of the cylinder.
Special ribs decrease the contact surface between the spring and the internal part of the piston body and consequently also the friction between metal and technopolymer is decreased during contraction and elongation due to the firing cycle.

100% MADE IN ITALY
100% COMPATIBLE MARUI


Safety & Usage Guidelines

This product meets all EU regulatory requirements. Professional assembly required. Order assembly service from Taiwangun or refer to materials below. Warning: contains small parts, not suitable for children under 14.
SKU: PM03 · EAN: 5904420006688 · ZERO-SHOCK Piston [FPS SOFTAIR] ·
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