To my knowledge it’s limited to parts that can be polymer and don’t need a ton of strength and thermal endurance. On an AR, I’m certain that would at least be the stock, buffer tube and lower receiver.
Biggest downside of these particular prints (in PLA+) is that the frame will melt if you leave it in a hot car.
Otherwise they are good for thousands of rounds and 30rd mag dumps though, and if you do melt a frame it's not like they are expensive or difficult to replace.
What parts can be printed these days
To my knowledge it’s limited to parts that can be polymer and don’t need a ton of strength and thermal endurance. On an AR, I’m certain that would at least be the stock, buffer tube and lower receiver.
^ This.
Biggest downside of these particular prints (in PLA+) is that the frame will melt if you leave it in a hot car.
Otherwise they are good for thousands of rounds and 30rd mag dumps though, and if you do melt a frame it's not like they are expensive or difficult to replace.
Lost PLA casting can be used to “turn it” into aluminum