Century arms stripped lower C15A1 for upper

I have a NEW Century Arms C15A1 stripped lower it had mag drop issues and i took it to a local gun smith and the issue was resolved (mags were really tight)

So i would really like to trade this for an upper 14.5" at the shortest not looking for an nfa upper

Also for the right upper i have a PSA moe lower parts kit & dpms commercial stock assembly i can through in to make it a complete lower ALL PARTS ARE NEW

So just for sale on stripped lower $500 + shipping & fees. FFL TO FFL ONLY

No one has an extra or stock take off complete or mostly complete upper?