Ive gotta agree with the majority here- my Gen 3/4 Glocks were not bad barrels- but not at all long line guns; maybe mid 80s to 90s on B8s. Victory 1st barrels made them all mid 90s, or at the very least- more consistent performers. The exception was a factory threaded barrel 19- hammer. Now that Im on my second Gen 5 19- Ive got minimal reason to snag an aftermarket- consistently mid 90s with 115 range ammo. The Gen 5 barrels are achieving much better accuracy than early generations.
If all things were equal, Glock barrel would be the better buy as it is $75 cheaper than KKM.
Sorry to piggy back here, but I am looking to buy a threaded barrel for my Gen 5 19. For my use, I will be running the pistol suppressed with a Rugged Obsidian 9.
Would I be better served going with a factory Glock threaded barrel, or a Silencerco barrel?
My biggest concern would be any loss of reliability with the aftermarket options.
There are numerous aftermarket companies making threaded barrels with the correct dimensions to function reliably in Glocks including KKM and Victory 1st which are well regarded in this thread. I also would note that the Glock factory threaded barrels are going to be the older barrels that were replaced by the Gen 5 "Marksman" barrels. The only real advantage I can see to going with a Glock factory threaded barrel beside the peace of mind from an OEM part is the M13.5x1 LH thread.
The advantage to M13.5x1 LH over 1/2x28, in my experience, is that the O-Ring inherent to the metric thread helps keep the can from walking as quickly. It certainly isn't a cure and having to tighten or at least check tightness on the can every magazine when training is a large reason why I hate having to use pistol cans along with the holsters you have to use with them (a Surefire Masterfire with the stupid automatic light actuator removed is the best option for a holster I have found and still leaves much to be desired).
I would also consider what gun you are using as a host for a pistol can if concerned about a loss of reliability with this pistol. Glocks are notoriously bad hosts both in relative sound and more importantly, reliability with the addition of a can. The most crucial thing that I have found for keeping pistols running with cans on them is keeping the piston and piston housing clean so that it can reciprocate freely and, what is often over looked, making sure the housing slots where the piston teeth fit in are free of debris so the piston can fully lock in at the end of a recoil cycle.
Thanks, I didn't know that Glocks were notoriously bad hosts.
They aren't. Some of the info you're being given is not very accurate.
Compared to what, and where are you getting your info? One of the Sig fanboy forums maybe?
The things you claim have not been my experience, or that of other guys I know who shoot suppressed pistols.