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.
Hannibalbarca wrote:
I was comparing them to mild steel because that makes up the majority of the steel being made and used.
That's pretty ridiculous "logic". There are lots of reasons low carbon "mild" steel is used to build bridges, skyscrapers, car body panels, etc. And there even more reasons it's not found in firearms and suppressors.
But it's clear you don't want to listen to those of us who actually build firearms and suppressors, so I'm not wasting any more time 'splainin. Good luck.
Hannibalbarca wrote:
I was comparing them to mild steel because that makes up the majority of the steel being made and used.
That's pretty ridiculous "logic". There are lots of reasons low carbon "mild" steel is used to build bridges, skyscrapers, car body panels, etc. And there even more reasons it's not found in firearms and suppressors.
But it's clear you don't want to listen to those of us who actually build firearms and suppressors, so I'm not wasting any more time 'splainin. Good luck.
My point was that, relatively speaking, Annealed 17-4 is hard. I can say that tool steel isn’t hard either by comparing it against tungsten carbide or some other tungsten alloy. I don’t understand why you’re getting so hung up on this, i didn’t mean anything by it other than that the volume of steel out there is very soft compared to 17-4 and certainly my options for other piston rods to use is soft.
Like I said, more importantly, it’s available in the diameters I would be able to use and it’s fairly resistant to corrosion.
You reccomended inconel or 422 ss, I couldn’t find any rods in the size I would be able to use.
Wow, that really is ridiculous. You've displayed that you know next to nothing about the things you're wanting to do, but apparently have no idea how little you know since you want to argue about any help you're offered. I think I'm done here too.
There is a simpler type of delay for blow-back type firearms.It consists of a groove or one turn helical thread in the chamber walls.The cartridge case swells into these shallow grooves at maximum pressure then releases the case as the pressure drops.This was successfully used in the Seacamp series of handgun's and several Soviet made sub-guns.This is a true delayed blow-back in its simplest form. Here is a reference to the Seacamp:http://www.guns.com/review/3051716-2/ This was pulled from Wikipedia :
PP-9 "Klin" (ПП-9 "Клин") chambered for 9×18 mm PMM, produced in 1996-2002. for the Interior Ministry. It features improved ballistics (due to a more powerful cartridge), the increased weight of the gate and the presence of helical grooves in the chamber.
I used this technique for the world famous J-22 pistol that I suppressed for a friend.The reduced report with the suppressor was very noticeable,almost like the slide never opened.You need to play a little to get the balance right so it functions as normal.You should remove the extractor before you test this or you might loose the extractor.The gun should fire extract and eject without a extractor in place.A extractor is only needed to remove un-fired rounds in a semi auto.
CL
The only reason after 243 years the government now wants to disarm you is they intend to do something you would shoot them for!
http://www.silencertalk.com/forum/viewtopic.php?f=10&t=79895
Capt. Link. wrote:There is a simpler type of delay for blow-back type firearms.It consists of a groove or one turn helical thread in the chamber walls.The cartridge case swells into these shallow grooves at maximum pressure then releases the case as the pressure drops.This was successfully used in the Seacamp series of handgun's and several Soviet made sub-guns.This is a true delayed blow-back in its simplest form. Here is a reference to the Seacamp:http://www.guns.com/review/3051716-2/ This was pulled from Wikipedia :
PP-9 "Klin" (ПП-9 "Клин") chambered for 9×18 mm PMM, produced in 1996-2002. for the Interior Ministry. It features improved ballistics (due to a more powerful cartridge), the increased weight of the gate and the presence of helical grooves in the chamber.
I used this technique for the world famous J-22 pistol that I suppressed for a friend.The reduced report with the suppressor was very noticeable,almost like the slide never opened.You need to play a little to get the balance right so it functions as normal.You should remove the extractor before you test this or you might loose the extractor.The gun should fire extract and eject without a extractor in place.A extractor is only needed to remove un-fired rounds in a semi auto.
CL
Do you have any photos or diagrams of a chamber with this helical groove in It?
Also, is it pressure sensitive and or recoil sensitive? As in would such a system would, purely such a system, work with the 460 rowland suppressed?
Is it difficult it machine this into the chamber and does it damage the brass?
I called masterpiece arms and they said that they didn’t change the bolt weight or the spring. The bolt was just a little over 30 ounces and they just reamed the barrel for 460 rowland.
I probably won’t need to go with any sort of delayed system or if I do I would do the helical groove chamber method(if I can find more technical data on that).
Will need to change out the bolt in the vmac or add a buffer tube with a spring and a weight.
fishman wrote:You probably should delay the blowback since you plan to suppress it. A groove in the chamber should do it.
Is there a more proper name for this delay system? I’d like to read more about but haven’t really found anything on it.
Is it a single helical helical groove in the chamber or multiple? How deep and wide is it? Would it still work if I fired regular low pressure 45?
fishman wrote:No. The groove would need to be perpendicular to those
So the groove would be a ring or multiple rings? Is the chamber just as it is, with the end of the chamber where the case sits against, and in the chamber you have ringed grooves?
I'm sorry guys age is catching up to me and I only get on line from time to time. I've seen this as a a single turn thread and as a ring.I used a 4 turn per inch in the .22 Jennings w/ only one turn. I've seen pictures of it but not sure where.I ground a tool for cutting mine 1x16 radius at .010 deep x one turn.I would imagine that multiple start threads would aid in delay.I chose 4 turns per inch as that's as slow as my machine will cut.A two turn per inch may be better but testing is needed.While the Russians may not give you any information maybe the builder of the Seacamp might.
PS: while not done very often I did harden the chamber to resist wear.The chamber was polished smooth and cycled as normal w/ or without the suppressor. Remington subsonic ammo was used.No other changes were needed.
CL
The only reason after 243 years the government now wants to disarm you is they intend to do something you would shoot them for!
http://www.silencertalk.com/forum/viewtopic.php?f=10&t=79895
