I've always wondered something about suppressors. Maybe the fine people in this forum can help me understand more.
I understand that a suppressor works pretty much like a muffler on a car - expanding gas dissipates into an enclosed chamber which reduces the audible sound of the shot fired. I also understand (from reading this forum) that - assuming you have the right equipment and legal issues addressed - suppressors are a fundamentally simple item to manufacture.
Here's my first question:
Inside the suppressor, is the path which the bullet travels a rifled tube (much like the barrel of the firearm) with a series of holes along it to allow the expanding gas to dissipate (somewhat like the Glock Compensated model barrels), or is the path which the bullet travels more like a series of aligned holes, larger in diameter than the bullet, which the bullet passes through (much like a muzzle-brake (break?) on a .50 BMG rifle)?
Now my second (simpler, I'm sure) question:
Is BATFE Form 4 the correct form for the purchase of a suppressor?
I'm rather certain that I'll have to submit to the same process for purchasing a suppressor as I would for a machine gun, but I wanted to double check that Form 4 is the correct form.
Thank you everyone!