The original owner, who was a CNC operator, but did this after hours on the side. I asked if he'd do another and the response was no.
When it came up for sale, I jumped on it. Used this on my DPG CZ and even though I sold the BA, I kept this, but am full Rem 700 SA compatible, and it's no longer needed.
It is very nicely done and the best magwell work I've seen to date for the extended mags.