The entire bolt and gas system are made of metal and run on metal inserts that guide the action and support all of the stress points. The Maruzen M1100 airsoft shotgun is powered by green gas stored in the removable butt pad. Depressing a hidden button, the butt pad slides out of the stock for gas recharging and maintenance. The gas chamber has a high capacity for liquid propellant because it does not share space with BBs. Click here for a big picture of the removable but pad gas reservoir.
Performance is nothing less than astounding.
The blowback effect is very like that of a genuine shotgun, shooters will revel in the live fire simulation provided by this airsoft gun. Be careful, ejecting shells fly as far as 2 meters. The optional brass catcher is highly recommended for dirty environments. Remember that cleanliness is paramount to good performance and long service life. Always keep your gun clean and use silicon spray to keep the action lubricated.