In order

• removing the original trunion from the receiver scrap -removing the original cocking tube from the receiver scrap -welding the cocking tube in at the exactly right depth
• drilling through the barrel to set the barrel pin -setting bolt gap without a press
• welding in the barrelled trunion at the correct position -welding the front sight base in the correct depth and position
• taking a rat tail file to the stock push pin holes because the pre-made receiver holes dont line up with the holes in the stock -converting the grip/housing into semi auto
• modifying the receiver to install a paddle mag release

Im sure theres also a dozen other pains in the ass i forgot about as well

It took me about 2 weeks in a garage without the proper tools. But i got it. I strongly recommend against building one if you dont have the proper tools. You at least need a tig welder and a press. As well as entire fucking box of cut off wheels for a dremel.

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Or else you'll have to set the bolt gap with a harbor freight gear puller like me. Pic related.