Counsel's Opinion on the British laws of Proof relating to
sound moderators and other muzzle attachments
Counsel has now confirmed that:
A sound moderator is not a “part” of a
“small arm” for the purposes of the Proof Acts.
There is no requirement in law for a sound
moderator to be subject to proof.
The cutting of a screw thread on a barrel
in order to affix a sound moderator is most unlikely to
“unduly reduce it in substance or strength”, although
each case will depend on its own facts.
The pronouncement made by the Proof
Authority in October 2001 is misleading and wrong in law
in a number of important respects.
The full text of Counsel's
Opinion may be downloaded and read here:
(27 kb Adobe Acrobat file) or
(46 kb Microsoft Word file)
On this website we provide technical product
information, suggested retail prices, hints and tips, guidance
on legal and regulatory matters, and links to the Finnish manufacturer's website
which includes independent test data and
If you have a question which is not answered
here, please don't hesitate to phone or fax us. All United Kingdom and overseas trade, retail and government enquiries are welcome.