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V-Mach Pistol Seal 16J 25mm Small Bore (Old) for Weihrauch HW77 | HW97
PS-HW77/97-25-12
New
Premium Part: V-MACH Piston Seal
Piston seals help airguns keep stable air compression, which improves velocity consistency and accuracy. With less friction inside the chamber, the piston moves more smoothly and transfers energy more efficiently.
For competitive shooters, this means tighter shot groups, reduced vibration, and more predictable performance over long sessions. Modern polymer seals also last longer, keeping the rifle performing at its peak.
This is a custom piston seal for the Weihrauch HW77 and HW97 25mm Small Bore models tailored for the best shooters.
V-MACH "...Specialized in Custom and Performance Air Rifles..."
More info
Piston seals in airguns play a crucial role in maintaining consistent air compression, which directly affects velocity stability and shot-to-shot precision.
Premium custom piston seal, from the V-MACH tuning house for the Weihrauch HW77 and HW97 25mm Small Bore models, for those expecting the best performance and the best results.
A high‑quality seal reduces friction inside the compression chamber, allowing smoother piston movement and more efficient energy transfer.
For top shooters, this translates into tighter velocity spreads, improved pellet flight consistency, and better control over long‑range accuracy. Modern seals made from advanced polymers also resist wear, keeping performance stable over many thousands of shots.
Upgrading to a premium piston seal can therefore elevate an airgun’s overall feel, reduce vibration, and deliver the kind of repeatability that competitive shooters rely on to stay at the top of their game.
Compatibility:
- Weihrauch HW77 (25mm Small Bore)
- Weihrauch HW97 (25mm Small Bore)
There are two possible part references for the HW 77 and HW 97 rifles, depending on the serial number:
- Rifles with a serial number below 1446649 require reference PS-HW77/97-25-12 (25 mm).
- Rifles with a serial number above 1446649 require reference PS-HW77/97-26-12 (26 mm).
About V-MACH:
V‑Mach is known for hand‑crafted, precision airgun components made in the UK, designed to elevate performance beyond factory standards.
Their parts, springs, piston seals, guides, and tuning kits are built with tight tolerances and premium materials, giving shooters smoother firing cycles and more consistent velocities.
Each component is individually finished for optimal fit; performance‑focused design, reduced vibration, cleaner shot release, and improved accuracy; parts engineered to maintain stability over thousands of shots.
Top competitors and enthusiasts choose V‑Mach because the upgrades deliver a more refined, predictable shooting experience, exactly what’s needed when precision and repeatability matter most.
Data sheet
| Observations | 16J 25mm Small Bore (Old model) |
| Compatibility | Weihrauch HW77 | HW97 |
| Country of Manufacture | United Kingdom |
