LMT MARS or KAC SR-15 IWS Stripped upper

Hi,

I’m looking to buy either a stripped LMT MARS upper or KAC SR-15 IWS Stripped upper to pair with a LMT MARS lower or KAC SR-15 IWS Lower for a 20" of what I think an M16A5 would be.

Please PM if you have one, I truly appreciate any help.

Jake