I bought an unexpectedly good barrel. its real price is higher than what i paid... - FM Products Ultra Premium Match Grade Threaded Barrel

A very precisely made barrel. Quite a strict chamber, but at the same time there was not a single bad feed of a cartridge. The coating is very smooth and strong.
The thread protection nut has an external diameter of the barrel. Thus, to pull the barrel out of the slide, you do not need to unscrew it... Well... or if you only have this barrel and need to shoot from a Glock 19l (47, 49, 17 gen 5) you can install and shoot. I have already tried this, and it turns out pretty good. If you need to shoot for a long time, do not forget to tighten the protection nut, or put it on a blue thread lock.
The question of the price is not clear... Why so cheap? Looks like it's been discontinued and is being sold out...
I'll have to buy more...