Any way to sneak a 10mm build into the pre-order instead? Almost the same parts. 
I'd also be interested in a California-friendly paddle cage or a shaved and drilled paddle similar to the UMP Raddlock.
I could potentially design, CNC and make available such a device with access to a demilled MP5/10 mag well and release mechanism if you want to chat about it; I run a precision manufacturing business on the side.
I'd also be interested in a California-friendly paddle cage or a shaved and drilled paddle similar to the UMP Raddlock.

I could potentially design, CNC and make available such a device with access to a demilled MP5/10 mag well and release mechanism if you want to chat about it; I run a precision manufacturing business on the side.