It certainly wasn't. However, it was the first of that design. All my sight pushers are my design, and don't copy anyone else's. My design has been copied by others, but they have failed to improve on it. The plug concept is Bullseyesmith's design. I only started making them when he disappeared for a year or so, and folks were clamoring for them. The design is quite simple, and anyone with a mill or a lathe can make them. The new guy seems to make a quality product, and offers some finish variations not otherwise available.