Doublestar is like most cheap makers: untested components, out of spec parts, and not very reliable in the long run.
You can build a BCM upper rifle with BCM M16 bolt for nearly the same price. Spending $700 on an AR should get you something that has a lifetime warranty, tested components, and to specifications for max reliability and performance.
I just noticed you bought an Armalite. It should last you quite well and it's what I'd call an above mid-range quality AR. For the vast majority of shooters they work just fine. You probably overpaid for it by buying it at a stealership.