G Code for Lower/Upper

[kyle.]

Does anyone know where I can find the G Code for a lower and for an upper AR (flat top) receiver set?

I've looked and looked and looked and I can't find anything

[BOOGIEMAN]

What? What is a G code?

[moneymike]

What? What is a G code?

What cnc mills run off of if I'm not mistaken. And OP, it is particular to your machine and what tools/bits you have available

[M1Kev]

Try cncguns.com

[ROOS_HAPPENS]

G & M code would be somewhat unique to the kind of machine you intend to use.
While generic FANUC G code might get you in the ballpark with many machines, M codes are all over the place, depending alot on the manufacturer.
In other words, there are a LOT of variables.
You need to find a reliable print, draw it on a CAD/CAM, decide the sequential order for machining operations, choose a precisely dimensionally defined tool, choose a tool path, and then let the CAD/CAM's post processor generate G code for ya...and unless it's a custom post, the code will probably still need to be tweaked.
It's not a matter of finding G code on the Internet & handing it to a machine shop. Programmers like to write their own, for the above reasons.

http://www.cncguns.com/forum/index.php

[Texas Boy]

Further to Roos_Happens' point - even if you had the identical machine and ran the identical software, just using someone else's G-code would be a bad idea. You would need to use the same jigs, endmills, coolant system, etc and same setup for the G-code to work.

I own a small CNC mill and frequent machinist forms online, some of which are dedicated to the very machine I own. I've never seen people sharing G-code on those forums. They will talk about feed rates, cutter types, etc and share drawings and techniques, but everyone generates their own G-code based on their machine and what works from their experience. If you have the drawings, the right software, and understand machining, creating G-code is pretty straightforward. This is done using special "CAM" software (as opposed to "CAD" software where 3D drawings are generated and viewed). A 3rd software package is then used to read the G-code and control the machine.

As others have mentioned, cncguns.com is a great place to start. Homegunsmith.com is another site dedicated to build your own types, but requires a subscription.

You might want to consider starting with an 80% lower. These can usually be completed with a drill press and some jigs. If you already have a mill, then a raw forging (no machining completed), or machine from billet would be the next most adventurous step, but this is a big step up from completing an 80%.

[kyle.]

Thank you guys.

It would appear that I have some more fancy book learnin to do.

[kurac]

having the "G-Code" is almost worthless., unless you are planning on making a lot of upper and lowers, its going to be way cheaper to just buy them.