Alex Bohl of Trajectory Arms is a good friend and a competent gunsmith, we commission Alex to assemble our UCF (Upper receiver, Complete, FCD) for us. All of UCFs have been assembled and test fired (all UCFs ship with the paper target used in test firing), he is both meticulous and knowledgeable, one of the very best in the industry.
These stainless steel carbine length gas tubes have been individually inspected to ensure they are kept to withing TDP specs (between .1794 and .180). This provides for a better seal than many tubes that can vary to as small as .178.
Shipped with a stainless steel roll pin. Made in the USA.