This is the 1/144 "Gundam [Kestrel]" Gunpla included as a supplement in the May 2012 issue of Dengeki Hobby Magazine 🐱
It's supposedly the main mobile suit from the Z Gundam side story "ADVANCE OF Z: Those Who Defy Time," but to be honest, I don't know much about it 💨
Since it's a Gunpla included as a magazine supplement, it's mostly a fixed model and doesn't move much. It's a simple, single-color molded kit, similar to the old 1st generation kits, but with a little modification, the simple standing pose looks pretty good, and painting it was a fun and rewarding experience.
If you're wondering, "What kind of kit is it?", please check out the production notes or the work in progress below.

1/144 Gundam [Kestrel] | クラフト's Gunpla works