This is a Micro Draco Chassis 3mf
This is not intuitive to put together and I'm not finished yet with the instructions.
Everything is oriented as it needs to be printed, use supports on overhangs....obviously split these up into separate plates.
The core pieces are a modified Model 1 handguard and M70 pic rail conversion i made a while back...they are connected by a rail, and the brace uses a remix of a remix of a remix of unseen killers folder rail thats pressed into the render of the m70 conversion. I would use an AFG... The Brace can be swapped out...I just like mine with small amounts of real estate for backpack storage.
To mount the front rail, align it with the insert, rotate like 30 degrees, then slide the top rail over the gun, rotate back 30 degrees, press it in the insert hard...it wont need a screw, but use one for durability (M5x30).
Mount the brace to the adapter, mount the rail to the adapter as well, screws should be mounted from the inside (2x m5x12s)
Mount the connector using the M5x45??? screw to the front rail...use a nut on the other side to tighten.
I check comments here so I can elaborate more if needed. Just ask...its possible something doesnt quite fit right or I forgot a part...just let me know. Ill upload an STEP with instructions when I make sure this is as good as it can be.
99% sure this is at least an SBR...unlike my other draco braces which are actually made to be used as braces and are short, these folders are harder to sell to the ATF for intent...so just keep that in mind.