bear creek has tons of uppers in stock right now too. pages of them... they've got their facility production turned up to 11 it seems.
last i checked earlier today, there were >10 or so calibers available, and over 80 configuration options to select from in both pistol and rifle configurations - including 5.56, 223 wylde, 6.5 grendel (type II), 300 blackout, 6.5 creedmoor, 308, 9mm, 7.62x39, 243 win, .224 valk, 450 bushmaster, 350 legend, and 458 socom
https://www.bearcreekarsenal.com/upper- ... es?stock=1prices have been going up steadily over the last 6-8 weeks, but appear to have leveled off for a moment. many uppers can still be had for under $400, but the majority are all >$300 right now - which is still a great price considering the rest of the market right now.