This is the first design, casted in metal. By Patrick Keith.
There's another one digitally developed for 3D printing. They used the same name but the model is a bit different.
Second version digitally developed is availble at:
https://www.myminifactory.com/object/3d-print-m4r1a-130665
Описания пока нет. Вы можете добавить его.