Originally Posted by Rob Edge
"By virtue of section 48 of the 1997 Act, firearms using compressed carbon dioxide as the
power source are treated as air weapons and, if not regarded as ‘specially dangerous’
(over 6 foot lbs in the case of a pistol or 12 foot lbs in the case of other air guns and air
rifles) are thus exempt from the firearm certificate procedure. Firearms using other gases
are not so exempt."
The last sentence in the exert from the official Guide on Firearms Licensing above would appear to suggest otherwise. The general opinion is that a FAC is required if you use anything other than air or CO2 which is given special dispensation.
