Yes, it can be legal to make a silencer. For everything Form-1, from silencer designs that are easily made, to filing forms with the BATF, to 3D modeling. Remember, you must have an approved BATF Form-1 to make a silencer. All NFA laws apply.
I was browsing CZusa's website earlier this morning and I came across their new silencer section.
Well, of course I looked through it, and I noticed a really unique integral setup.
Looks like the baffles are adjustable, via the baffles screwing into the tube.
With the large threads, they said it wasn't real bad to get it apart if you clean after about 300 rounds or so.
At least they're thinking out of the box
A unique (and patented) baffle thread cuts through accumulated crud for regular cleanings, which we recommend
be done every 300 rounds due to the dirty nature of rimfire ammunition.
Cool concept, might be more interesting as a "tunable" rifle can if a design like that could stand up to the pressures.
I'd probably not buy one for 22 simply out of fear of crud welding the thing shut.
http://www.youtube.com/watch?v=BDtd2jNIwAU MUSAFAR!
http://www.youtube.com/watch?v=8CrOL-ydFMI This is Water DavidW
Complete Form 1s http://www.silencertalk.com/forum/viewtopic.php?f=10&t=79895
Saw exactly that from a Kansas City outfit a couple years ago. I didn't think much of it then, and still don't. A rimfire can that needs to be cleaned every 5 or 6 boxes? No thanks.
The reduced picture in the OP was a bit fuzzy, but this one from the CZ website shows it clearly enough. Seems they're essentially using the threaded baffles as chasing taps, such that the user is to carve them through lead and carbon every time the thing gets dismantled for cleaning. And from the thread count, I sure hope they're supplying a very long pin tool or somesuch to unscrew these with a hand drill, because turning that deepest baffle 100 times or so to remove it looks like a pesky chore. And they've used 7075 aluminum so the edges on those baffle thread cutouts are going to grind down fairly quickly against primer glass dust, basically forcing more and more grit into the metal and rounding it over and making the fit sloppier every time it's cleaned. A disposable integral can? Makes no sense. Makes slightly more sense on their standalone rimfire can, which seems to use the same system from the description. But in either case I'd say nah, not a good plan.
T-Rex wrote:I hope the backside has a hex broach or socket fit, for extracting the baffles.
But the baffles come out the front. Seems they've counter-bored the barrel to create the integral suppressor volume, then threaded that, so 7075 baffles are being screwed into and out of a steel thread every time one cleans. And I'm not seeing any hex flats in those baffle bores, just smooth round drilled holes. This sort of primitive baffle design - basically a washer with a clipped nipple - is the sort of thing one might find in an airgun suppressor. Doesn't seem they did much or even any R&D. And while varying the spacing could be instructive, resulting in better or worse suppression depending on how you break up the sound waves using these varying intervals, I just don't see how 5 baffles (4 moveable baffles plus the profiled endcap) are going to get anywhere close to the performance of even a 6" x 1" K baffle rimfire can. I suppose the main selling point is that it doesn't look suppressed. If being sneaky like that matters to some people.
T-Rex wrote:Seems they've counter-bored the barrel to create the integral suppressor volume, then threaded that, so 7075 baffles are being screwed into and out of a steel thread every time one cleans.
I was seeing it as an aluminum liner, which is internally threaded for the baffles. I assumed the entire sleeve would slide in and out of the barrel.
Edit:
I also see some relief cuts in the baffle threads, so the fouling isn't so hard on the threads. Gives it somewhat of a channel to chip away any "heavy" deposits.
a_canadian wrote:But the baffles come out the front.
Sorry if I was vague. I always refer to the baffle face as the front, since it is the leading edge where gas contact is concerned. They could have cut/broached a hex in the target side of the baffles or, maybe, some holes for a pin aligned type insertion wrench.
I didn't catch that there might be a threaded sleeve, good one.
Seems like a bunch of extra machining and poor baffle design, considering today's available technologies.
