We have a 3 and a 4 axis Cnc mill as well as a Cnc lathe with live tooling which probly won't help much on this project. I'm gonna play with it over a long period of time, I am thinkin of totally different porting to increase flow with custom manifolds. As long as I get oil to the places that need it and some volume of coolant through it I am happy. I don't think cooling will be much of an issue if the system I efficient enough.
Can't 3d print a head yet
Can't 3d print a head yet 
They can, just not in steel. Right now just plastic. My brother is thinking of buying one of those machines.
How much do they charge for Chocolate? Easter is coming...
Print one in plastic for the hell of it. My friend told me about this the other day couldn't believe it was real.
Print one in wax, then make an investment casting from any commonly available foundry alloy.
Steve.
A plastic printed AR15 can fire 600+ rounds, I bet we can idle for a minute with a plastic head.
A plastic printed AR15 can fire 600+ rounds, I bet we can idle for a minute with a plastic head.
Huh. The one I saw fired 6 rounds and snapped in half.
Sent from Outer Space!
Defense distributed has youtube video of the new improved one, the guy looks like his hand is getting pretty tired around 400 rounds.