Hi Tony, although the video is over 5 years old I'd like to make a couple of observations if you don't mind.
Having trained with the M14 in 1969 with the US Army we never had to use scraping tools to remove excess, hard carbon. Bore cleaner was more than sufficient.
Today, as a new owner of a used M1A, I recently disassembled the rifle. Although very clean generally the gas system was heavily fouled. The piston had to be driven out with a few light taps with a brass hammer. Once out it was soaked in Hoppes No. 9 for a little while then cleaned externally with a toothbrush and internally with a snug fitting brass-bronze brush, wiped out with a Hoppes soaked patch then dried with a clean patch. The rest of the gas system was cleaned pretty much in the same way then reassembled. No scrapers were needed and I've never had to resort to using scrapers of any kind on any of my gas operated firearms. To me a scraper is overkill!
When applying lubricant on the threads of the gas plug all that's needed is to apply a small amount in a straight line down the side of the plug instead of covering all the threads. The amount on the line of lubricant will distribute all that's needed when the plug is screwed in. The grease will distribute into and over all threads during that process. The amount used in the video is a waste of lubricant as it will either squeeze out or push itself into the chamber of the gas system.
That's just my 2 cents worth.
I subscribed to your channel awhile back and did give ya a thumbs up though.

This guy complicates a lot of really easy tasks. And invest a lot of money in tools that we never needed or had a use for to service the M14 or my M1A

Keeping the channel on YT. Thank you Tony, all great content.

I finally got my hands on a M1A this year. Brings back old memories of the Southeast Asia. Your videos are a great help. Don't remember that much about it from 50 years ago.

We used our M14s for our field training extensively, firing lots of blank cartridges. A blank firing device was mounted on the front of the flash suppressor to hold back some of the pressure so the rifle would function. We fired lots and lots of blanks causing lots and lots of fowling. In spite of this, we never used any scrapers or any kinds of abrasives other than the standard GI brass bore and chamber brushes. The GI butt stock tool was plenty sufficient to disassemble the rifle except for the bolt and trigger assembly.

Thanks for uploading this video.  I thought it would be a difficult task to clean the gas system but that actually looks really easy.

Excellent videos on this weapon system. Fantastic for the beginning M14/M1a owner. Thank you.

Tony today I ordered all the tools from sadlac thanks I will be watching all your videos for the M1A thank you for giving me confidence

Thank you Tony.  Great video.  I needed it.

Hey man. Just wanted to say thanks for uploading all of this detailed info about the M14. I got a Loaded model a few months ago and your collection of videos are probably the richest and most detailed on YT. I'm a detail-oriented person so it's nice to learn from someone that leaves no stone unturned. You should make a video about your history with the rifle and how/why you're so familiar with it!

So glad I found your video's. I'm telling my friends about you we have the m-1a.

I just tried it and it worked marvelous! Thanks Tony!

Excellent information ! Excellent video !
5⭐

You're the man tony!

Love your videos very informative, could you do a video on all the uses of a M14 combo tool that are kept in the stick of an M1 thank you for all the great info 👍🏼

I really enjoy these videos.  I have loved to work on firearms since I was a young boy.  Some 50 years later, I am still learning.  This is a great set of videos patiently walking through all the steps with no slight of hand or shortcuts.  They are such high order professionals that they can anticipate where the problems are for novice and experienced hand alike.  I could sit at the feet of these guys all day long, soaking it in.  I purchase all of my equipment from them for two reasons: high quality and these videos.  Thank you.

Thanks Tony, very helpful!

Great vid thanks

Great job, great riffle it's good to be an American. Thanks for the help.

Excellent video.
Thank you .👍🏻👍🏻👍🏻