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08-17-2015, 11:45 AM
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!