I looked for this before and struck out which suggests to me there are no county codes about this. However, there are county sound ordinances you should be careful about.
http://ccgovernment.carr.org/ccg/code/mainMenu.asp?function=browse
If sound levels are an issue, does anyone know whether it's legal to build a permanent suppressor? I don't mean that the way it sounds - not permanently attached to the gun, but something that lives permanently attached to a stand or the shooting bench that will absorb some of the expanding gasses, into which you can put the muzzle of your gun.
eg. I build something out of some copper or steel piping (or whatever I decide is a good idea) that, when the gun's muzzle is inside it, acts to dampen some of the report. It is NOT attached to the firearm in anyway, and may be permanently mounted to a bench or a lever arm, making it effectively a piece of furniture. Kind of like those pay-to-view binoculars they have at scenic views and such.
Does this fall under the same regulations as a firearm-attached suppressor, or is it something else?
Also, I totally call dibs on the patent, so hands off.
(24) The terms "firearm silencer"
and "firearm muffler" mean any device
for silencing, muffling, or diminishing
the report of a portable firearm,
including any combination of parts, designed
or redesigned, and intended for
use in assembling or fabricating a firearm
silencer or firearm muffler, and any
part intended only for use in such assembly
or fabrication.
(3) The term "firearm" means (A)
any weapon (including a starter gun)
which will or is designed to or may
readily be converted to expel a projectile
by the action of an explosive; (B)
the frame or receiver of any such
weapon; (C) any firearm muffler or firearm
silencer; or (D) any destructive device.
Such term does not include an
antique firearm.
I've spoken with people at both the Hyattsville and Baltimore branches, as well as with people at the NFA Branch, but no one could answer me and I was eventually told to email my question:
My (limited) understanding is that for a thing to be classified as a suppressor it must be portable, attachable to the firearm, reduce the gun's report by 2 dB or more and be intended to act as a suppressor (eg. not a muzzle brake, even though it might incidentally reduce report slightly). I recognize that my understanding is far from complete.
Here's the scenario:
If I own property on which it is legal to shoot but doing so makes too much noise for my liking, is it legal for me to construct a large object that is permanently attached to either a shooting rest or bench, or perhaps even permanently attached to the ground itself and is not attached (or attachable) to a firearm in any way whatsoever if that object is intended to reduce or redirect the report of the firearm?
For example: If I've got a range on my property that meets all legal requirements, can I stack 6-10 truck tires in a row on a table so that if I aim down the middle of the stack a decent quantity of the report will be contained or redirected by the tires without breaking any laws? Can I construct a table/bench to which the tires would be permanently affixed? Can I use something smaller than truck tires? How small can it get before it qualifies as portable? What about lawnmower or wheelbarrow tires? What if I construct something along the same lines as a conventional suppressor using the same materials, but it differs from conventional suppressors in that A) It cannot ever be attached to a firearm and B) it is permanently attached to something else, like a wall or a post that's buried in the ground?
Thank you for your time - I look forward to your response.
This is the email I sent to the ATF's Firearms Technology Branch on Wednesday, after being told that all questions must be sent in writing:
Hopefully this will yield concrete answers (that are in a shooter's favor) - everyone else I asked either said "You need to talk to Branch X" or "That's the craziest question anyone's ever asked me, and you need to talk to Branch X."
I caught my mistake about the suppressor (one of 'em, anyway), by the way - it's about being for a portable firearm, not about the suppressor being portable. Then again, I was told that these are the guys that actually make policy, so maybe something good will come out of it.
...but in the definitions a silencer is a "firearm" too.
Right - I'm not sure how that works. Does that mean that a suppressor in a pocket is a concealed weapon?
The 18 USC does not cover concealed weapons laws and so therefore the defintion of firearm in 18 USC does not affect other laws dealing with concealed weapons or their definition of "weapon" or "firearm".
What you are referring is generally called a baffle. Very little to no actual noise reduction. What you hopefully do is redirect sound.