Wolverine Airsoft BOLT HPA Engine – Tokyo Marui VSR-10
The Tokyo Marui VSR-10 is already the most popular bolt-action platform in airsoft — the Wolverine BOLT HPA Engine makes it exceptional. Designed specifically for TM VSR-10 receivers, it replaces the factory spring and cylinder with regulated pneumatic power. The result is near-perfect shot-to-shot velocity consistency that no spring build, regardless of spring quality, can reliably achieve.
The BOLT operates entirely mechanically via your bolt cycle, with no electronics and no battery required. Every shot is driven by clean, regulated HPA, giving you remarkably quiet operation and genuine consistency at range. Velocity is adjusted via your inline regulator. It’s the natural next step for any VSR-10 build that has progressed beyond what spring upgrades can offer.
- HPA engine designed specifically for the Tokyo Marui VSR-10
- Mechanically actuated by bolt cycle — no battery or electronics
- Near-perfect shot-to-shot velocity consistency from regulated HPA
- Significantly quieter than spring-powered equivalents
- Replaces factory spring and cylinder assembly
- Adjustable velocity via inline regulator
- Works alongside the full VSR-10 upgrade ecosystem





