It’s a complete slide and magazine. Very high quality. Had one, but sold it to my BIL.
I have no doubt as to the quality and that they work fine. I just dont want more parts to have to keep track of. I already have a basement full of rifle build parts and reloading tools/supplies. Somewhere at the bottom of a lake I have two safes full of guns I lost in that boat accident...Just too much for this ‘going on sixty’ old man to keep track of.