I suppose it's not necessary, but I wanted to add my 'voice' to those others in praise of AIM's excellent service.
I've bought many rounds of ammo from them (back when SA 7.62 was $150 and $180/can anyway...) and recently, as I get back into ARs, PMags.
I've never had to call and hassle them and, being fortunate enough to live in SW MI, I get sub-200lbs. orders within two business days, typically.
Thanks for being there, folks.