I picked these up years ago on the RPF, shortly before MR released their own set. They have resin grips, but the body is machined aluminum with brass parts.
As you can see, they mostly fit into the MR shipping box, save for longer barrels and other size variants around the triggers. I wondered who whipped these up, as they must have been a MASSIVE research project. I sure got the better part of that deal, I've seen the MR and never looked back about using these. Besides, I can tell everyone that my barrels are longer, and they can't argue Does anyone remember who was working on specs and making these before MR got in the game? Just curious,