Good question. I guess maybe I was a little a vague. I'm looking for the trade to include:
My Lower - Colt, Std colt internals, Std Colt trigger, Colt 4 pos car stock
Your Lower - Colt, Std colt Internals, NM Trigger, M4 collapsible stock (RRA is fine, no need to spend the extra for colt).
Please let me know if I can attempt to add any additional desciption.