Fit was excellent, accuracy as good as factory (given my capabilities), ran 100% in testing. - True Precision Pistol Sig P365 XL Barrel, Non-Threaded

OP performed their part perfectly, as usual.

I purchase the barrel to finish populating a stripped, SIG factory slide to use as an Optics only slide, leaving my stock slide, with sights, available as an option without affecting the optics settings if I only had one slide and had to swap sights.

Yes, it was more expensive but complete slides were not available at the time I started the project.

After the, now normal, time it takes to locate and acquire the internal parts for the slide, I decide to research what my barrel options were and decided on the TP barrel, non-threaded in black.

I put the barrel in the slide that came with my P365 XL, for testing, and my experience is described in the Title line.

Very pleased but plan to test it in the Optics barred as soon as I can get my hands on the Optic I want currently backordered in OP.