Makita MAC5200 Owner's Manual page 27

Never use the tool with other than compressed air.
If bottled gas (carbon dioxide, oxgen, nitrogen,
hydrogen, air, etc.) or combustible gas (hydrogen,
propane, acetylene, etc.) is used as a power source
for this tool, the tool will explode and cause serious
injury.
*Always check the tool for its overall condition and
loose screws before operation. Tighten as required.
Make sure all safety systems are in working order
before operation. The tool must not operate if only
the trigger is pulled or if only the contact element
is pressed against the wood. It must work only when
both actions are performed. Test for possible faulty
operation with nails unloaded.
COMPRESSED
AIR