One thing I regret is never getting around to having that one frame I designed produced.
Totally ULE'd, the frame would have made for one of the lightest setups ever because you can get rid of the rail.
I'll bet if the frame were made from glass-filled nylon it would fantastically light... and still no rail.
I'd be up for producing a few prototypes if someone had the capabilities... all my personal machines are not CNC.
This version of the design isn't completely ULE'd... it has a cutout for an MPA-3 pneumag piston directly under the on/off and a tab for easy mounting of the MSV-2.
Notice the cutouts & holes to accomodate a sear directly in the frame.
This was a plainer version with an integrated 15 degree foregrip.
This frame could have also accomodated a sear.