Back up on this part, since of CLP replacing LSA, you should not be shoving anything like the pipe cleaner brushes down the gas tube.

Instead, muzzle downward, give the back end of the gas tube in the receiver a quick shot of CLP when you are chamber brush cleaning the chamber with CLP to allow it to flow down the tube and into the bore, then when you are cleaning the last of the chamber fouling out by running brush down it and out the muzzle, you will remove the extra CLP in the bore as well.  

Hence bore clean first with something like Sweets solvent that does not require a lot of brush scrubbing, patch that out, move onto the chamber with chamber brush/CLP by hand and a quick shot down the gas tube of CLP, then once you have the upper cleaned and dry, move on to the B/C parts and lower that you have given a shot of CLP to the parts before you started the upper.

CLP has a cleaning agent in it, while LSA does not.

As for the CLP in the Gas tube and FSB/gas block gas passage during cleaning, leave it there.  It going to dissolve any fouling that may start to build up (both from the gun powder, and the solvent that you are using to clean the bore), and the first shot through the rifle after it has been cleaned is just going to drive any CLP fouling the B/C where it will be cleaned up the next cleaning.

To add, what you are seeing on the tail of the bolt, is the copper solvent that you have been using to clean the bore, which was driving up into the FSB passage to begin with and left to site.  As stated, when the rifle is fired after cleaning, it going to drive that mess (solvent with copper fouling) back to the B/C, and what you are seeing.  Worse, will be long term when the solvent dries during long term storage, and can block the FSB passage instead.  If this happens from not doing the CLP shots down the tube at cleaning, just give the tube a good shot of CLP, and leave the rifle Muzzle down over night to let the CLP go to town disolving the sold mess to all the gas tube/gas passage self clean when the rifle is shot again.

If you need CLP, then BreakfreeCLP in the large 16oz spray can is about the least expensive way to buy it civilian wise, short of either buying through GSA in the gallon or 55 gallon form instead.


LSA, and used for rigs like the M-60/Mk-19 that need a liquid lube (over the dry teflon lube in CLP) to keep the rig running instead.

PTFE (Polytetrafluoroethylene) is teflon, and its just the new formula has less amounts in it that the old formila; so you don't get the  teflon  settlement on the bottom of  on the new forumla when it stored and not shaken for a while in a clear bottle .

https://www.safariland.com/products/holsters-and-gear/gun-cleaning-kits-and-components/cleaners-and-solvents/gun-lubricants-and-protectants/clp-cleaner-lubricant-and-preservative-15337.html

Nice bottle of Royco 463 (and what I still prefer).
Royco 634 is more closer to the new BreakfreeCLP, which new BreakFreeclp now only has 1% teflon; while the 634 has no teflon in it isntead.

Really between the BreakfreeCLP  and Royco CLP, ROYCO uses a 40% solution of solvent in their mixture for CLP, while Break-Free CLP uses  20% solvent (little more in the pressureized  spray can form) instead.

Nevermind, I see it is answered above.