I think your theory about the damage is correct: sounds like it was dropped. That can cause some more significant damage in several areas. I don't think the drop explains the power feed issue, though. It's possible it happened that way, but the "dead spot" sounds like several broken teeth ...

It might be interesting to put it on the outside of the tube. It would contribute some sound dampening properties, and probably protect you from getting burned by touching a hot can. Plus, it would make the suppressor look all blurry and ethereal.

There are several reasons using it that way wouldn't work. Aerogel is relatively fragile, I doubt it would have the compression strength to hold up to the blast. Air does not move through it, so filling space with aerogel would effectively just reduce the volume of the suppressor.

I've never quite understood why nobody makes a modern interpretation of the Welrod. I've actually thought about making a vaguely Welrod-inspired bolt-action 22 pistol out of a Savage MKII or something. Maybe someday I'll make a proper replica in 9mm. That is a fantastic video. I wish I could get a h...

gunny50 wrote:

cdrissel wrote:Like this ?

Yes
Without all the milling, that part was completely made on a mill, mine come from a CNC lathe.

I could make that part entirely on my CNC lathe. Probably in one operation.

In my experience, cashing checks is one of the few things the ATF does very quickly. I would suspect something got lost..

Would you make a threaded insert, to be molded into the print, for the muzzle threading? I guess, if T.I.R. is minimal, plastic threads may be enough for 22, no? With a good printer you could print undersized threads then run a tap through it. That should keep it in place well enough. I'd give the ...

No s--t?!?!? Good to know. :mrgreen: I believe you're talking about how it works for a legitimate 07/0x business and not the guy who started this thread who just wants toys without paying the tax. It would work that way for any FFL, but you have to at least intend to make a profit from your busines...

Wasn't sure about how easy it is to get your personal collection out. It's already "out". The form 4 process is a tax on transfers. If you make NFA items as an FFL, and then stop being an FFL, you already own the items so no transfer has occurred. You retain ownership, ATF does not pass g...

22-250 is very similar, as far as suppressor design is concerned, to 308. 60-degree cone baffles in a 1.5-inch tube would be the typical choice. There are indeed a lot of car parts that could be machined into baffles and end caps if that makes sourcing your metal easier, but I wouldn't want to try e...

I am still working on different calibers with this so I don't have info for different calibers yet but here is what I have tested and found so far. I started with an all cone 30cal suppressor with no clips and 8 cone baffles, next I put the radius scoop in, lastly I cut them .125" deep to cent...

Are they as addictive as suppressors? In my experience, generally yes. However, unlike suppressors, lathes tend to become less addictive as you acquire machines of higher quality and mass. For example, my first lathe was an 11" made by Sidney in the roaring 20's, originally for use with a line...

Nicely done. I like that front cap.

As fishman said, 24, 28 and 32 TPI threads are common. Around 0.75 to 1.0 mm pitch would be good if you're into that sort of thing. You're right, there won't be a standard size that works right. Just pick a pitch, and make the minor diameter the same or a few thousandths larger than your tube's ID. ...

mr fixit wrote:

BinaryAndy wrote:
If everything is in reasonably decent shape, the Takisawa will make the PM seem floppy by comparison.

That is the biggest issue. I am lacking the knowledge to evaluate what shape a used machine is in.

This site covers most of it: http://www.mermac.com/

You want that Takisawa Webb. That's a real machine. They were really mid-to-upper-end industrial lathes. There is an enormous difference between that and the Chinese hobby machines you're looking at. If everything is in reasonably decent shape, the Takisawa will make the PM seem floppy by comparison...

The biggest problem with diamond is that it really doesn't do well on ferreous materials. As I understand it this has to do with carbons solubility in iron, basically iron will erode diamond pretty quickly as the temperature rises. This. Diamond is the best thing out there for machining aluminum an...

You could even indicate the pitch diameter by setting the lathe's lead screw as if to cut the same pitch as the muzzle threads, and using a test indicator with a very small contact point mounted to the carriage and carefully set to read on the pitch of the threads. Alternatively, after machining the...

I thought about doing this a while back. I was going to use a Sherline mini-mill spindle. If your lathe has a very slow back gear speed, you could use this setup for threadmilling; cut your threads in one or two passes and get some reasonable surface speed for 1/2-28 threads.

This Nikasil is a name brand but the coatings are numerous.TiAIN,TiCN,TiN,AITIN,Zirconium Nitride to name a few.Military rifle bores and chambers have been coated for years w/ electroless nickel.If this can be applied to titanium the surface erosion at higher temperatures will be eased. I wonder if...

Sharp HSS is a good idea, but for some reason I've always had better luck with the ridiculously sharp carbide inserts like some of the ccgt inserts intended for finish cuts on titanium and super alloys. Ive done this as well however be warned you will get ridiculously sharp long stringy chips That ...

304 certainly wouldn't be any easier. I'd rather work with 17-4. 303 is a lot nicer, and as Capt. Link mentioned, 416 is pretty easy. Neither is going to hold up as well as 17-4 though. Sharp HSS is a good idea, but for some reason I've always had better luck with the ridiculously sharp carbide inse...

The tube, baffle stack and end cap print as a single, disposable assembly, so servicing the can is as simple as printing another $3 part. What part of this is legal, w/o another tax stamp? :roll: I'm no legal expert, but wouldn't it be possible to designate the flash can as the registered part? The...

That looks really great, nice work. How did the anodizing go?

Just a few things to add here. 17-4 can be improved a lot by hardening it, no doubt, but it's still really quite strong and wear resistant even in the annealed condition. It really is dramatically better than 304 and 316. It has more than double the yield strength. One failure mode of baffles that I...