Wolverine Airsoft BOLT M HPA Engine – JG BAR-10
The Wolverine BOLT M is the medium-cylinder variant of Wolverine’s BOLT HPA sniper engine series, designed specifically for the JG BAR-10 platform. Like all BOLT engines, it operates entirely mechanically — actuated by your bolt cycle with no electronics and no battery — but the M specification provides a cylinder geometry tuned to the BAR-10’s receiver dimensions for optimal performance and fit.
Replacing the factory spring and cylinder with regulated HPA power, the BOLT M delivers near-perfect shot-to-shot consistency that spring builds struggle to match at range. The result is quieter operation, more repeatable velocity, and the predictable trajectory that makes the difference in competitive sniper play. If you’re building a serious BAR-10 HPA rig, the BOLT M is where that chapter begins.
- HPA engine designed for the JG BAR-10 platform
- Medium cylinder (M) variant
- Mechanically actuated by bolt cycle — no battery or electronics
- Near-perfect shot-to-shot velocity consistency from regulated HPA
- Quieter operation than spring-powered equivalents
- Replaces factory spring and cylinder assembly
- Adjustable velocity via inline regulator





