Anderson built its reputation on being the cheapest name on the shelf that still works. That reputation is mostly deserved — provided you understand what you are buying and where the money was saved.
The AM-15 is Anderson Manufacturing's AR-15 pattern line: stripped lowers, complete lowers, uppers and complete rifles built to mil-spec dimensions at the value end of the market. The receivers are forged 7075-T6 aluminum, which is the same material specification used by manufacturers charging several times more.
The factory trigger is the obvious one — serviceable, gritty, heavier than it needs to be. Furniture is basic polymer. On complete rifles, the barrel is adequate rather than exceptional; it will hold practical accuracy but it is not a match tube.
None of that is a defect. It is the trade that makes the price possible, and every one of those parts is replaceable on your schedule.
As a foundation to build on: yes, clearly. As a finished rifle you never touch again: it will run, but you will notice the trigger every time you shoot it. Buy the receiver, spend the savings on the fire control group and the optic, and the result punches well above what you paid.