They sell the M4E1 Enhanced lower at TruPrep for $99, maybe slightly less if on sale. I called and told them the price @ primary arms and asked if they wanted to match and they said they couldn't come anywhere close to $59.99 or matching w/ cost of shipping.
PSA... or Anderson?
I'm waiting for them to call me and let me pick up my Primary arms order of Aero M4E1 lowers that was delivered this morning at 10:30AM.
Perhaps I can use... even more lowers haha