08-16-2015, 09:28 AM,
(This post was last modified: 08-16-2015, 09:29 AM by 140DB.)
|
|
|
Posts: 28
Threads: 8
Joined: May 2014
Reputation:
1
|
|
|
Cutting down a barrel - correct tools?
Posts: 28
Threads: 8
Joined: May 2014
Reputation:
1
08-16-2015, 09:28 AM
(This post was last modified: 08-16-2015, 09:29 AM by 140DB.)
Talked to you guys about this before, but wanted to make sure I purchase the correct tools for the job.
1. Looking to shorten the barrel on 2 Chinese T56 SKS' to 16.5" (within ATF/NFA legal rules). ATF site shows that the barrel length measurement is taken from the receiver (where the barrel is threaded or pinned in). Is this correct?
2. Planning on doing the cut with an air-tool cutoff wheel. Any pros/con's to cutting this way? I know I can use a hacksaw, but thought it would be way more convenient/quicker to just use the air-tools I have.
3. To get the trued 90 degree cut, planned on using a file to smooth out the rough cut, then using PTG's 90 degree muzzle facing tool with a .300 pilot - would this be the correct pilot size for a 7.62x39 SKS barrel?
http://www.midwayusa.com/product/743874/...sugv743874
4. Want to do an 11 degree crown. Again using PTG chamfer tool:
http://www.midwayusa.com/product/684575/...12-330-366
5. Wanted to thread the barrel to accept an AR style brake/flash hider.
Was originally going to use a 1/2-28 RH die to cut the threads, but another smith explained that the SKS barrel would be too thin to accept this threading and recommended going M14X1 LH or RH. Thoughts on this?
The threading die I'm looking at is this one: http://www.cncwarrior.com/M14-x-1-LH-Die-p/22961.htm
So before I order the tools, just wanted to verify and get some additional thoughts.
TIA!
“The two most important days in your life are the day you are born and the day you find out why.” - Mark Twain
1. Looking to shorten the barrel on 2 Chinese T56 SKS' to 16.5" (within ATF/NFA legal rules). ATF site shows that the barrel length measurement is taken from the receiver (where the barrel is threaded or pinned in). Is this correct?
2. Planning on doing the cut with an air-tool cutoff wheel. Any pros/con's to cutting this way? I know I can use a hacksaw, but thought it would be way more convenient/quicker to just use the air-tools I have.
3. To get the trued 90 degree cut, planned on using a file to smooth out the rough cut, then using PTG's 90 degree muzzle facing tool with a .300 pilot - would this be the correct pilot size for a 7.62x39 SKS barrel?
http://www.midwayusa.com/product/743874/...sugv743874
4. Want to do an 11 degree crown. Again using PTG chamfer tool:
http://www.midwayusa.com/product/684575/...12-330-366
5. Wanted to thread the barrel to accept an AR style brake/flash hider.
Was originally going to use a 1/2-28 RH die to cut the threads, but another smith explained that the SKS barrel would be too thin to accept this threading and recommended going M14X1 LH or RH. Thoughts on this?
The threading die I'm looking at is this one: http://www.cncwarrior.com/M14-x-1-LH-Die-p/22961.htm
So before I order the tools, just wanted to verify and get some additional thoughts.
TIA!
“The two most important days in your life are the day you are born and the day you find out why.” - Mark Twain
|
|
|
Find
|
08-17-2015, 11:45 AM,
|
|
|
Posts: 21
Threads: 0
Joined: Oct 2014
Reputation:
1
|
|
RE: Cutting down a barrel - correct tools?
Posts: 21
Threads: 0
Joined: Oct 2014
Reputation:
1
You are correct about the barrel length measurements. Yes, you can use a cut-off wheel to cut the barrel, just make sure you don't overheat the barrel by tring to go too fast and that you leave enough room to file it and not be too short. Yes, the .300 pilot should work for the muzzle facing tool. I think that chamfer tool should work just fine as it comes with the same size pilot of .300. As for the threading the barrel for a muzzle brake, off the top of my head I don't know if the SKS barrel is too thin for the 1/2-28 threading. But, if you do use the M14 LH threading, that is an AK style threading, not AR, so you should look at AK style muzzle brakes. I think that's about it. Looks like you've got a pretty good handle on what you're doing. Please let us know if you have any more questions.
(08-16-2015, 09:28 AM)140DB Wrote: Talked to you guys about this before, but wanted to make sure I purchase the correct tools for the job.
1. Looking to shorten the barrel on 2 Chinese T56 SKS' to 16.5" (within ATF/NFA legal rules). ATF site shows that the barrel length measurement is taken from the receiver (where the barrel is threaded or pinned in). Is this correct?
2. Planning on doing the cut with an air-tool cutoff wheel. Any pros/con's to cutting this way? I know I can use a hacksaw, but thought it would be way more convenient/quicker to just use the air-tools I have.
3. To get the trued 90 degree cut, planned on using a file to smooth out the rough cut, then using PTG's 90 degree muzzle facing tool with a .300 pilot - would this be the correct pilot size for a 7.62x39 SKS barrel?
http://www.midwayusa.com/product/743874/...sugv743874
4. Want to do an 11 degree crown. Again using PTG chamfer tool:
http://www.midwayusa.com/product/684575/...12-330-366
5. Wanted to thread the barrel to accept an AR style brake/flash hider.
Was originally going to use a 1/2-28 RH die to cut the threads, but another smith explained that the SKS barrel would be too thin to accept this threading and recommended going M14X1 LH or RH. Thoughts on this?
The threading die I'm looking at is this one: http://www.cncwarrior.com/M14-x-1-LH-Die-p/22961.htm
So before I order the tools, just wanted to verify and get some additional thoughts.
TIA!
(08-16-2015, 09:28 AM)140DB Wrote: Talked to you guys about this before, but wanted to make sure I purchase the correct tools for the job.
1. Looking to shorten the barrel on 2 Chinese T56 SKS' to 16.5" (within ATF/NFA legal rules). ATF site shows that the barrel length measurement is taken from the receiver (where the barrel is threaded or pinned in). Is this correct?
2. Planning on doing the cut with an air-tool cutoff wheel. Any pros/con's to cutting this way? I know I can use a hacksaw, but thought it would be way more convenient/quicker to just use the air-tools I have.
3. To get the trued 90 degree cut, planned on using a file to smooth out the rough cut, then using PTG's 90 degree muzzle facing tool with a .300 pilot - would this be the correct pilot size for a 7.62x39 SKS barrel?
http://www.midwayusa.com/product/743874/...sugv743874
4. Want to do an 11 degree crown. Again using PTG chamfer tool:
http://www.midwayusa.com/product/684575/...12-330-366
5. Wanted to thread the barrel to accept an AR style brake/flash hider.
Was originally going to use a 1/2-28 RH die to cut the threads, but another smith explained that the SKS barrel would be too thin to accept this threading and recommended going M14X1 LH or RH. Thoughts on this?
The threading die I'm looking at is this one: http://www.cncwarrior.com/M14-x-1-LH-Die-p/22961.htm
So before I order the tools, just wanted to verify and get some additional thoughts.
TIA!
|
|
|
Find
|
08-17-2015, 02:14 PM,
|
|
|
Posts: 2,216
Threads: 124
Joined: Jun 2014
Reputation:
8
|
|
RE: Cutting down a barrel - correct tools?
Posts: 2,216
Threads: 124
Joined: Jun 2014
Reputation:
8
Brave guy... I think I would want a 'practice' barrel first. I'd be afraid on the first time doing something like that (if I had the equipment) that I would screw it up. Maybe someone has an old worn out one you could try as your first attempt.
"An unarmed man can only flee from evil, and evil is not overcome by fleeing from it." -Col. Jeff Cooper
"An unarmed man can only flee from evil, and evil is not overcome by fleeing from it." -Col. Jeff Cooper
|
|
|
Find
|
08-17-2015, 03:00 PM,
|
|
|
Posts: 607
Threads: 35
Joined: Jan 2015
Reputation:
0
|
|
RE: Cutting down a barrel - correct tools?
Posts: 607
Threads: 35
Joined: Jan 2015
Reputation:
0
CNC Warrior makes good stuff. That threading die should work well. 14-1 LH threading is the standard for Combloc weapons like the AK and SKS. There are a couple others that work as well. Personally I'd stick with the 14-1 LH threading.
|
|
|
Find
|
08-17-2015, 04:52 PM,
|
|
|
|
Posts: 28
Threads: 8
Joined: May 2014
Reputation:
1
|
|
RE: Cutting down a barrel - correct tools?
Posts: 28
Threads: 8
Joined: May 2014
Reputation:
1
08-17-2015, 04:52 PM
(08-17-2015, 03:00 PM)rwhite135 Wrote: CNC Warrior makes good stuff. That threading die should work well. 14-1 LH threading is the standard for Combloc weapons like the AK and SKS. There are a couple others that work as well. Personally I'd stick with the 14-1 LH threading.
Thanks for confirming ! First time trying something like this and wanted to get as much input so that I don't royally screw things up.
“The two most important days in your life are the day you are born and the day you find out why.” - Mark Twain
(08-17-2015, 03:00 PM)rwhite135 Wrote: CNC Warrior makes good stuff. That threading die should work well. 14-1 LH threading is the standard for Combloc weapons like the AK and SKS. There are a couple others that work as well. Personally I'd stick with the 14-1 LH threading.
Thanks for confirming ! First time trying something like this and wanted to get as much input so that I don't royally screw things up.
“The two most important days in your life are the day you are born and the day you find out why.” - Mark Twain
|
|
|
Find
|
08-17-2015, 04:55 PM,
|
|
|
|
Posts: 28
Threads: 8
Joined: May 2014
Reputation:
1
|
|
|
RE: Cutting down a barrel - correct tools?
Posts: 28
Threads: 8
Joined: May 2014
Reputation:
1
(08-17-2015, 11:45 AM)David@reddot Wrote: You are correct about the barrel length measurements. Yes, you can use a cut-off wheel to cut the barrel, just make sure you don't overheat the barrel by tring to go too fast and that you leave enough room to file it and not be too short. Yes, the .300 pilot should work for the muzzle facing tool. I think that chamfer tool should work just fine as it comes with the same size pilot of .300. As for the threading the barrel for a muzzle brake, off the top of my head I don't know if the SKS barrel is too thin for the 1/2-28 threading. But, if you do use the M14 LH threading, that is an AK style threading, not AR, so you should look at AK style muzzle brakes. I think that's about it. Looks like you've got a pretty good handle on what you're doing. Please let us know if you have any more questions.
David: Thanks for the tips! Appreciated!
“The two most important days in your life are the day you are born and the day you find out why.” - Mark Twain
(08-17-2015, 11:45 AM)David@reddot Wrote: You are correct about the barrel length measurements. Yes, you can use a cut-off wheel to cut the barrel, just make sure you don't overheat the barrel by tring to go too fast and that you leave enough room to file it and not be too short. Yes, the .300 pilot should work for the muzzle facing tool. I think that chamfer tool should work just fine as it comes with the same size pilot of .300. As for the threading the barrel for a muzzle brake, off the top of my head I don't know if the SKS barrel is too thin for the 1/2-28 threading. But, if you do use the M14 LH threading, that is an AK style threading, not AR, so you should look at AK style muzzle brakes. I think that's about it. Looks like you've got a pretty good handle on what you're doing. Please let us know if you have any more questions.
David: Thanks for the tips! Appreciated!
“The two most important days in your life are the day you are born and the day you find out why.” - Mark Twain
|
|
|
Find
|
08-20-2015, 10:01 PM,
|
|
|
Posts: 2,268
Threads: 207
Joined: May 2014
Reputation:
0
|
|
RE: Cutting down a barrel - correct tools?
Posts: 2,268
Threads: 207
Joined: May 2014
Reputation:
0
I think it would be great to add a gallery of pics while you are doing it.
|
|
|
Find
|
08-20-2015, 10:01 PM,
|
|
|
|
Posts: 2,268
Threads: 207
Joined: May 2014
Reputation:
0
|
|
RE: Cutting down a barrel - correct tools?
Posts: 2,268
Threads: 207
Joined: May 2014
Reputation:
0
(08-17-2015, 02:14 PM)BelieveIn308 Wrote: Brave guy... I think I would want a 'practice' barrel first. I'd be afraid on the first time doing something like that (if I had the equipment) that I would screw it up. Maybe someone has an old worn out one you could try as your first attempt.
Yeah, i wouldn't do this. This is why having David and Tim in my corner make a great asset. 
(08-17-2015, 02:14 PM)BelieveIn308 Wrote: Brave guy... I think I would want a 'practice' barrel first. I'd be afraid on the first time doing something like that (if I had the equipment) that I would screw it up. Maybe someone has an old worn out one you could try as your first attempt.
Yeah, i wouldn't do this. This is why having David and Tim in my corner make a great asset.
|
|
|
Find
08-21-2015, 08:33 AM,
(This post was last modified: 08-21-2015, 08:35 AM by BelieveIn308.)
|
|
|
|
Posts: 2,216
Threads: 124
Joined: Jun 2014
Reputation:
8
|
|
RE: Cutting down a barrel - correct tools?
Posts: 2,216
Threads: 124
Joined: Jun 2014
Reputation:
8
08-21-2015, 08:33 AM
(This post was last modified: 08-21-2015, 08:35 AM by BelieveIn308.)
Yep, to me, I'll bring it to an experienced gunsmith first. Besides the idea that I would screw it up, I don't think I would buy the tooling and equipment to do 1 or 2 barrels. I prefer letting a professional handle it.
"An unarmed man can only flee from evil, and evil is not overcome by fleeing from it." -Col. Jeff Cooper
"An unarmed man can only flee from evil, and evil is not overcome by fleeing from it." -Col. Jeff Cooper
|
|
|
Find
|
Board
Search
Member List
Calendar
Red Dot Arms
Help
