I remember evaluating the Kaweco Al-sport when I was looking for a durable metal pen for EDC after my Metropolitan bit the dust. I think I didn't choose the Kaweco because the pocket clip for it had some issues with slipping off/not being tight enough based on some reviews. Instead a I went with a copper INK V2 from Karas that has the clip fastened to the pen by machine screws, which I was happy about since in theory I can replace the clip if it ever goes bust. I've had good luck with the company in terms of repair so far. The inner o-ring for the cap of my pen got worn down so that it no longer provided enough friction to reliable prevent the cap from unscrewing when the pen was clipped to my shirt, and the company sent me several new o-rings for free. Eventually, they made o-ring kits a regularly available product. I bought this pen with the intent that it be the last one I buy, and so far it looks like that will be the case.

Pen I'm using: https://karaskustoms.com/product/ink-v2-fountain-pen/

Little brother to above pen, currently being blown out for 1/2 the Kaweco's price: https://karaskustoms.com/product/fountain-k-v2/