Posting observations some may find useful and others may see as sacrilege.
Directed to this forum by a TCM owner unhappy with his barrel so I will start there.
Most of the barrels I have taken off appear fine to eyeball examination.
Today I cleaned seven barrels recently removed from current production rifles.
One was clearly rough with tool chatter marks the full length of the bore.
One more seems to have a double edge to the rifling.
I do not have access to a bore scope that will fit down a .22 bore but I was able to use one for a look from each end.
I did find one of the "Good" barrels to have some odd pits in the bore near the chamber.
I would conclude that Armscor barrel quality still varies so suggest that if you are staying in
.22 TCM you may want to examine the bore before taking delivery if possible.
Not an issue for me as I replace the barrel anyway.
I do resell the takeoff's for only $50.00 shipped in the lower 48 states.
Can also cut them shorter and thread the muzzle 1/2-28 or 5/8-24.
I will be getting my own bore scope soon for close examination before reselling more barrels.
I find that I have to polish the casting line of the magazine release fairly often so that it will move freely.
Beware trying to refinish the stock!
It seems most of the color of the stock is in the varnish used.
If you sand through it the wood is very nearly stark white and impossible to match to the original color.
Extractors may have burrs or heavy tool marks which can cause them to bind in the bolt.
Remove and lap as needed.
The 9mm conversion has been fairly popular and makes the best possible silencer host as it eliminates the action noise of a semi-auto.
If you get tired of issues in .22 TCM I can convert yours to 9mm/.40 SW//10mm.
.40/10mm will lose some magazine capacity.
My 9mm conversion page,