Search found 447 matches

by mr fixit
Wed Jun 24, 2020 9:54 pm
Forum: Silencersmithing Forum
Topic: Welding endcaps
Replies: 9
Views: 327

Re: Welding endcaps

the problem is the amount of heat required to melt the rod with a stick welder puts so much heat into the part. large thick parts are ok with it, thin small parts warp. TIG allows pinpoint arc placement and a much smaller and controlled heat affected zone.
by mr fixit
Tue Jun 23, 2020 3:05 pm
Forum: Silencersmithing Forum
Topic: end cap strike, 9mm threaded can
Replies: 9
Views: 311

Re: end cap strike, 9mm threaded can

You'd know that indicating it in 4-jaw. Gets down to almost no runout, move dial indicator back on piece a few inches and now there's runout. If no matter what there's runout when measuring a few inches apart your stock is out of round. If you have the needle type dial indicator vs the plunger type...
by mr fixit
Tue Jun 23, 2020 2:36 pm
Forum: Silencersmithing Forum
Topic: end cap strike, 9mm threaded can
Replies: 9
Views: 311

Re: end cap strike, 9mm threaded can

How do I check the tube to see if it is 'right'. If i had to bet that's where I would wager the concentricity is off, I had to thread it in the 4 jaw with a steady rest.
by mr fixit
Tue Jun 23, 2020 12:34 pm
Forum: Silencersmithing Forum
Topic: end cap strike, 9mm threaded can
Replies: 9
Views: 311

Re: end cap strike, 9mm threaded can

I did wonder if shooting through an empty tube would have any effect on the bullet. Since the bullet never outruns the gas in the singe chamber a tube with no baffles creates, would it push the bullet at all?
by mr fixit
Mon Jun 22, 2020 10:47 pm
Forum: Silencersmithing Forum
Topic: end cap strike, 9mm threaded can
Replies: 9
Views: 311

Re: end cap strike, 9mm threaded can

The endcap had no damage. just a brass kiss I found after the bullets were hitting a foot low at 25 yds. I opened the endcap bore to .422 and now all is good
by mr fixit
Mon Jun 22, 2020 10:45 pm
Forum: Silencersmithing Forum
Topic: end cap strike, 9mm threaded can
Replies: 9
Views: 311

Re: end cap strike, 9mm threaded can

an 11/32" aircraft extension drill will give you a close approximation w/o buying drill rod. You did all these with your 4 jaw chuck and indicated the work every time? Also, did you torque the bejeezus out of both caps? I would say you threaded an end with too much runout, have an [both?] endcap sh...
by mr fixit
Wed Jun 10, 2020 11:06 pm
Forum: Silencersmithing Forum
Topic: end cap strike, 9mm threaded can
Replies: 9
Views: 311

end cap strike, 9mm threaded can

As I posted previously, I'm working on a 9mm can for a Glock AR SBR. I have a Griffen style taper mount I made from 17-4 for the brake mount. I made the endcaps and threaded the tube myself. This afternoon I finished the distal end cap. I threaded it all together and put it on the AR just to shoot i...
by mr fixit
Tue Jun 09, 2020 10:01 am
Forum: Silencersmithing Forum
Topic: Order of operations for End cap help? *EDIT now finished with pics*
Replies: 10
Views: 574

Re: Order of operations for End cap help?

Thanks to all for the help and suggestions, I got it done. As is not uncommon, I ended up doing it differently than was suggested here. https://i.imgur.com/ih4xXo5.jpg?2 https://i.imgur.com/dsZEP4A.jpg https://i.imgur.com/3EdugG5.jpg I ended up turning and threading the exterior threads first so I c...
by mr fixit
Thu May 14, 2020 7:43 pm
Forum: Silencersmithing Forum
Topic: Order of operations for End cap help? *EDIT now finished with pics*
Replies: 10
Views: 574

Re: Order of operations for End cap help?

I'm making everything. But I don't have thread wires Do have a machinist handbook? Check what wire goes to the thread pitch and go to a music shop and buy piano wire in that size. Honestly, you should have a set of wires. They're dirt cheap and very useful. I'd make the tube first, threading both e...
by mr fixit
Thu May 14, 2020 6:32 pm
Forum: Silencersmithing Forum
Topic: Order of operations for End cap help? *EDIT now finished with pics*
Replies: 10
Views: 574

Re: Order of operations for End cap help?

Are you making the tube or buying? If making, I'd do it like this: (making end cap mount first) Part will be made as if chuck was tube (you'll be able to stick QD device into part properly) Profile and thread OD (using wires to confirm thread sizing) Bore interior to female thread Dmin Cut taper (a...
by mr fixit
Thu May 14, 2020 5:27 pm
Forum: Silencersmithing Forum
Topic: Order of operations for End cap help? *EDIT now finished with pics*
Replies: 10
Views: 574

Re: Order of operations for End cap help?

Basically i need to make this and keep it concentric:

Image
by mr fixit
Thu May 14, 2020 5:22 pm
Forum: Silencersmithing Forum
Topic: Order of operations for End cap help? *EDIT now finished with pics*
Replies: 10
Views: 574

Order of operations for End cap help? *EDIT now finished with pics*

I will be making a threaded end cap, with a taper for attachment. I have a Griffen style taper muzzle brake, I need to make the near end cap with a internal threads and internal taper for the brake, and external threads for the tube. I'm thinking profile the threads for the tube, and bore the intern...
by mr fixit
Tue Mar 24, 2020 10:24 pm
Forum: Silencersmithing Forum
Topic: Help threading barrel
Replies: 23
Views: 1600

Re: Help threading barrel

Yes and no. If the bore is straight, it'll be fine. Lots of bores arent perfectly straight. Ive done it on a very short barrel. It works but isnt a best practice. n't do it if the plan is for running suppressed. snip Gives you an idea how they are made. Like Ecco said, protect the barrel from the s...
by mr fixit
Mon Mar 02, 2020 6:32 pm
Forum: Silencersmithing Forum
Topic: Would like help making K baffles
Replies: 7
Views: 3041

Re: Would like help making K baffles

ECCO Machine wrote:
Sun Mar 01, 2020 12:39 pm
Yup
Thank you sir. With that configuration, have you found blast chamber to be an issue with first round pop? I'm assuming putting the face of the blast baffle about 1/4-3/8" off the muzzle.
by mr fixit
Sat Feb 29, 2020 8:33 pm
Forum: Silencersmithing Forum
Topic: Would like help making K baffles
Replies: 7
Views: 3041

Re: Would like help making K baffles

I played with quite a few K baffle designs in pistol cans. Ultimately, tightly spaced double radius clipped 60° cones outperformed all the K baffle designs. I was actually happy about that, because even though Ks are more material efficient, I can make cones in about 1/3 the time, including the ind...
by mr fixit
Fri Feb 28, 2020 10:58 pm
Forum: Silencersmithing Forum
Topic: Would like help making K baffles
Replies: 7
Views: 3041

Would like help making K baffles

I'm really torn ..... I have a stamp for a 9mm can that will live on my Glock lower AR SBR. I keep going back and forth between 60* cones and stuffing as many as I can in a tube, and making K's. My plan is either 1.625" or 1.5" OD. Im not trying for as short as possible, but rather just long enough ...
by mr fixit
Sat Jan 18, 2020 6:21 pm
Forum: News Stories
Topic: ITAR regs, moving from Trade to Commerce department
Replies: 1
Views: 2184

ITAR regs, moving from Trade to Commerce department

I just saw a blurb about registration for the firearms industry being moved from under the Trade department to the Commerce department. From what I read, there will no longer be a requirement for manufacturers to register and pay ITAR fees. Just wondering if that includes suppressor manufacturers.
by mr fixit
Tue Dec 24, 2019 12:14 am
Forum: Silencersmithing Forum
Topic: building custom buffer for suppressed 9mm AR?
Replies: 9
Views: 1322

Re: building custom buffer for suppressed 9mm AR?

It doesn't get full travel since it is longer than standard. Im pretty sure it doesnt make up a lot of momentum with the short travel
by mr fixit
Fri Dec 13, 2019 10:58 pm
Forum: Silencersmithing Forum
Topic: building custom buffer for suppressed 9mm AR?
Replies: 9
Views: 1322

Re: building custom buffer for suppressed 9mm AR?

Just to give an update, I turned a buffer from CRS. Ended up about 5" long, weighs 9.2oz. Installed and tested with WWB 147gr. Build is a NFA Glock mag lower, 5.5" 9mm barrel, using a standard mil-spec buffer tube and standard carbine spring. Total weight of bolt/carrier and buffer is right at 23oz.
by mr fixit
Wed Dec 04, 2019 6:38 pm
Forum: Silencersmithing Forum
Topic: Machining 416
Replies: 3
Views: 490

Machining 416

I know some here have used some 416ss, and would like to know what it is like to machine and use for baffles. I'm considering 416 baffles for a 9mm PCC build that might also see both sub and super 300Blkout. What I have found is in the annealed state. Just wondering what I am getting into.
by mr fixit
Tue Dec 03, 2019 10:55 am
Forum: Silencersmithing Forum
Topic: Basic Lathe Adjustment
Replies: 17
Views: 3770

Re: Basic Lathe Adjustment

Also go over to Hobby Machinist site. Lots of good information and help there.

https://www.hobby-machinist.com/forums/ ... -here.208/
by mr fixit
Fri Nov 22, 2019 10:14 pm
Forum: Silencersmithing Forum
Topic: building custom buffer for suppressed 9mm AR?
Replies: 9
Views: 1322

building custom buffer for suppressed 9mm AR?

Wondering if anyone here has any experience with 9mm AR carbines, Specifically, making a longer than normal custom buffer to increase weight in the blow-back action as well as limit travel of the carrier/bolt.
by mr fixit
Wed Nov 13, 2019 4:29 pm
Forum: Silencersmithing Forum
Topic: Jacketed tube for 50 BMG?
Replies: 17
Views: 991

Re: Jacketed tube for 50 BMG?

I'm gonna answer short and sweet as well; what you propose is not worth the time, effort,expense, and paperwork. To elaborate, aluminum in centerfire is a bad idea. Freeze plugs are very much less than ideal as baffles (and I say this as the proud maker of a freeze plug can). Assuming you have a 50B...
by mr fixit
Wed Nov 13, 2019 11:40 am
Forum: Silencersmithing Forum
Topic: Advice on baffles for 9mm carbine
Replies: 1
Views: 771

Advice on baffles for 9mm carbine

Going a new direction for 9mm AR carbine. I have an approved form 1 for 9mm, which if I remember correctly is approved for 18". My original plan was to perm attach a monocore to a short barrel. After much reading and research, I think it is best to take the advice offered and not do a permanently at...
by mr fixit
Fri Nov 08, 2019 3:18 pm
Forum: Silencersmithing Forum
Topic: Help threading barrel
Replies: 23
Views: 1600

Re: Help threading barrel

T-Rex wrote:
Thu Nov 07, 2019 1:47 pm
Cuz pics of catheads :)



I just threaded a junk of 1018, so it fit the spindle.
Welded a piece of 2-1/2 or 3" CS pipe to that.
Turned the OD true.
D&T all the socket-head screw holes.
Cant see the pic. thought it was because i was at work, but cant see it at home either.