Details......
I started with a NIW Colt stock kit off the EE from willg.
Then I bought a slabside reciever from brushdog. EE purchase also.
thirdly, a barrel assembly, another EE purchase.
I bought a Superior Lower, and LPK from RB Precision.....swapped the RRA from my M4gery.
Today at the Gun Show I bought a RRA B/BC/CH from Spike's Tactical. Done!!