Not semi fit - Apex Tactical Specialties Grade Threaded Semi Drop-In S&W M&P Barrel

Local gunsmith who has charged quite fairly for services, $5 to throw on and time an ASR muzzle device, $150 to thread extend and then 1/2x28 thread the extension for a 9mm barrel, quoted me $200 to fit the the barrel bc it was so out of tolerance. So, I said nope and he informed me he could extend and thread the factory barrel for $150. This barrel came in poor packaging, a plastic bag, all beat to heck too. So I just returned it.