Title 1 - there are tons of uppers that are nice and will do, define what you intend to do with it more and the answer will emerge.
When AIM was running DD V5 uppers for under that price that would have been an instant recommendation, and it's still worth looking at the Rainier Ultramatch setups with a light handguard of your choosing.
Obviously any BCM factory option makes sense, and if you can pick up a used Colt 6920/6720 upper that budgets you almost enough to attach a Centurion C4 FSP handguard to install yourself.
عندما تصبح الأسلحة محظورة, قد يملكون حظرون عندهم فقط
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Semper Fi
"Being able to do the basics, on demand, takes practice. " - Sinister
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