Now this is a nice innovations for airsofters using HPA. We encurage all innovations that help to integrate your HPA into the rifle itself. Personally I love the HPA concept, but hate the external ghostbusters tanks...

Now MANCRAFT comes with a new design M4 stock. Not the most beautiful out there, but a very functional one. It can accommodate 13ci (0,21l) HP tank AND the regulator itself! All inside the stock. Regulators from MANCRAFT itself will fit, also regulators from Wolverine reg will fit as well, Redline, nijna will also fit. All hiding within the stock itself. Continue reading the have more details...

Features
- Material: Aluminium, Anodized black.
- At the back: hole for small manometer. 
- Stock itself will also work as a Tournament lock.
- 5 places to put QD sling.
- Weights around 400g (0,4kg / 0,9lb)
- Stock itself can be mounted on any kind of rifle where you are able to connect standard M4 stock (also using adapters, for example for AK/G36 etc)

The complete set includes: 
- M.A.S.S mk1, M4 stock
- set of screws
- CNC machined connector for the HP tank
- high pressure hose (with working pressure over 1300PSI (HP tanks have ~850PSI at output))
- two types of connectors for the regulator (1/8"NPT and connector for regulators that usually are screwed on the HP tank (warning! They are pre-assembled)