In the market for my first Grendel.

[crusader18]

I looked at Primary Arms and they only list Radical Arms uppers, still within your price range. Concur with Sticks as to barrel length. A barrel of 24 inches is not needed to reach out to 1k.

I bought on of the RA Complete Uppers(20in.) from PA, I thought I'd start cheap to try it out. The upper was nothing but problems FTFs, FTEs, FTFs...tried it with different mags, different ammo. After 20 rds. I wound up sending it back to PA, because nothing would make it work(YMMV). On the bright side, they took it back and gave me an instant refund. I wound up buying a NeptuneEL 20in. Upper from Mark over at Precision Firearms and it was definitely worth the money and wait. I would recommend PF highly to someone looking for an upper.