Wolverine Airsoft SMP O-Ring Kit
The Wolverine Airsoft SMP O-Ring Kit is the complete O-ring replacement set for the Wolverine SMP (Sub Machine Pistol) HPA engine. The SMP is Wolverine’s HPA engine designed for sub-machine gun and compact pistol-format AEG conversions — using a form factor suited to smaller internal dimensions than the INFERNO or HYDRA AEG engines. The SMP engine contains O-rings throughout its air path that maintain the sealed HPA supply from inlet to nozzle. Over operating cycles these O-rings wear, harden, or crack — causing air leaks and inconsistent cycling in SMP-powered builds.
OEM Wolverine maintenance kit for SMP engine servicing. For SMP engine operators experiencing air leaks or declining velocity from their HPA compact platform, this kit is the correct O-ring replacement set for the SMP engine.
- Wolverine Airsoft SMP O-Ring Kit
- Complete O-ring set for all SMP engine sealing positions
- For Wolverine SMP sub-machine pistol HPA engine
- Restores air sealing after O-ring wear or degradation
- Made by Wolverine Airsoft — leading HPA airsoft specialist



