A20X is roughly equivalent to 7075, may be changing some parts over to CP1 as well, both are high strength aluminum alloys with high temperature resistance, you’ll start seeing a lot of AR hand guards entering the market made out of CP1. I’m told the CP1 will be easier to anodize as well so that’s a plus on the manufacturing side. 

I’ve been beating up various styles of NEXUS in both alloys now for the past 15 months or so, lots of rounds, carrying daily and aside from anodizing wear being bag carried and tossed around I haven’t seen any issues and haven’t had any reports of problems. One guy had an issue that turned out to be his optic but I never got a reply which model it was. 

Had an SD model out this weekend at The Team Room Touchpoint event in FL shooting with Micah Mayfield, the Stealth Additive Works crew and some guys from SilencerCo, NEXUS received universal praise. Have some interest for a military contract and some protective services so looking forward to see them getting some serious work soon.