john
im not sure whats contained in your shop drawings but they may be useful if you are willing to provide them
also just to be clear i am not thinking or going to attempt to fit f/a parts to a semi receiver or try to build an illegal weapon, quite the contrary what i want is a non restricted 18.5 inch barrel rifle and was considering closed bolt primarily for accuracy and to keep the dirt out.
so i need the diameter of the barrel so i can get one made to fit and examine the cost before i coomit to the project.
as far as i know i wont be breaking any firearms law by changing the category of the gun from restricted to non restricted but please tell me if im wrong in my interpretation.
thanks