This is my replica of Civil War era Maynard 50 caliber breech loading black powder carbine. I have been using tools for well more'n 35 years..I have multiple lathes and mills and surface grinder and heat treat furnace and Rockwell hardness tester, bandsaws , welders and,and,and ....I threw everything I had at this project and still had to make special cutters and setups along the way. Took approximately 3 months..Used a rifled barrel blank and store-bought nipple and I bought the 3 leaf rear sight. But made every thing else including bolts and springs..Worked from the drawing in Frank DeHaas book "More Single Shot Rifles and Actions" ..Plus had a man with an original gave me some dimensions..I used cnc mill to rough out the parts and then everything else was done on manual machines. Good shooter.Also have a second one half done but on back burner for a while.Its chambered in .45 acp because I load that cartridge and have plenty extra for plinking.