What are these 'Real Stamped' Diecasts? Any Info?

I was watching a video on YouTube and got real excited about buying a diecast. I went on to eBay and found these 'Real Stamped' sheet metal die-casts by a company called The Milestone Group. I had never heard of them before but didn't think much of it and thought it would be a unique and heavy car much like an Action Racing Collectible.

It arrived and was the lightest product I've ever held. It is the same size as a normal 1:24th scale diecast, but this car is really light. It is also detailed with good interior detailing. The exterior is metal, but very thin, while the chassis is plastic. I am sort of disappointed, but at the same time this is such an oddity. I included a lot of photos of the box for reference.

This brand also did a really good job with the Dodge Avenger body, and I am curious if they used someone else's casting or made this completely on their own.

I was wondering if anybody knew anything about these diecasts and who made them. These obviously appeared pretty late into NASCAR's Prime, and a lot of diecast companies were fading away. Would love to know some history behind this brand.