Ok no bullpup
You need for a AR is upper , lower
Barrel , barrel nut , gas rings , gas tube and a gas block
Buffer tube and buffer , FCG group , bolt carrier and magizine
And of course the little bits that go with the above.
You can substitute a gas piston for the DI system.
Make your own chassis , drop in parts
There you go
CW Shooters Supply Inc
Machine Shop and Finishing Services to the trade and public