I think making a pistol caliber/ rotating bolt/ piston system to work would involve a huge piston (like the size of a beer can), as the pressure is quite low compared to a rifle round. You could put the gas port right at the end of the chamber, but that kinda defeats the purpose of having a rotating bolt/ gas piston design.All good ideas. I would not mind looking into a 9mm type AR in PISTON.
Any of the above mentioned welders have a quick FAQ/101 webpage and a recommended welder that is good?
I do spot welding ATM.
Thank you, this is a good starting point for me.How much do you want to spend? If you're only doing weapon work, a TIG welder is probably best.
But the learning curve and price as well as the needed accessories (argon, electrode, filler, and the
knowledge needed to pick the correct accessories) is too much trouble for most.
A MIG welder of some sort is probably the best balance between simplicity, price, and flexibility. You can
use flux core wire or gas.
Stick welding is the least expensive option, but like everything else in this hobby, you pay the difference with your skill.
Oxy Acetylene and a filler rod works too, but I've never used this method before.
Disclaimer- I am not a professional welder, just a normal guy with rich friends that have cool toys.