Homebuilt automatic rifle surrendered in Bogota

A homebuilt automatic rifle among other firearms and explosives surrendered in Bogota

video

This homebuilt automatic rifle was voluntarily surrendered during a weapons amnesty in Bogota, Colombia. The large diameter, fully encapsulating receiver suggests it is of a straight blow-back design utilizing a very large and heavy open-bolt (likely telescoping the entire barrel) to compensate for having no breech locking system. The trigger housing and skeletonized grip layout is very reminiscent of the .45 ‘Minuteman’ submachine gun design detailed in the book ‘Improvised Weapons of the American Underground’. Two revolver grips have been added. A very interesting exhibit from the land that also gave us scratch-built submarines…