Here is a 10-round AR15 magazine I printed (grey one). It looks a lot like a Magpul brand PMAG (black one)! The PMAG holds 30-rounds though so that’s why it is longer. The printed one isn’t as strong as the other, but I think it would be good printed with Z-PC-ABS!
This is where I got the STL file.
With support…
Support removed, un-assembled…
Comparison to PMAG…
Comparison to PMAG…
Comparison to PMAG…
Bullets inside…
Mag inside AR15…
Awesome… I was going to try and print one myself.
Did you find a STL for one yet? There may be better versions but that one came out really good! I don’t have a 10rd mag spring though so I couldn’t test how well it feeds… I could print a 30rd but I would rather wait for black PC-ABS. 
Awesome !!! But for sure you need Z-PCABS for it.
Best Regards
I have the files from the Site that got shut down. Got to them before they we’re removed.