Awesome PDF, thanks! I find it interesting to note that it no longer seems to mention M-LOK as an option. Also interesting is the use of the newer NATO rail on top standard but the older Picatinny on the handguard with NATO optional. They're basically the same but it's weird they would do the two at the same time.
That P30-style interchangeable back/sidestrap grip sounds pretty cool too.
Did a mockup of the handguard for M-LOK slots, since I like the aesthetics more than HKey.
Also squared off the handguard some
and removed the 6 o'clock rail.