Wolverine Quake HPA Recoil Stock for M4 (Stock / Spartan Board) Set:Stock Only dramatically improving the consistency and

dramatically improving the consistency and making it safe to use with standard regulators

Fitting may be needed as the condition of each airsoft gun might be different

The ARP 556 utilizes standard M4 style magazines

which despite its age is still used alongside modern pistols today

Wolverine Quake HPA Recoil Stock for M4 (Stock / Spartan Board) Set:Stock Only dramatically improving the consistency andDesigned to work with any Wolverine Airsoft HPA engine, the QUAKE stock adds an extra level of realism which was not available with any Electropneumatic HPA system until now! Technical Notes: The QUAKE stock does require permanent modification of the gun, and we will provide a detailed video tutorial on installation. Wolverine Airsoft is not responsible for parts falling off, breaking, etc. from the recoil which most AEG's are not designed to for. We