I figure my .300 AAC build will go as slow as molasses in...well, Alaska... but I've made a little progress. The extension tube came in today (but not the armorer's wrench) so I gave it a quick test assembly:
Aero Precision lower with CMMG LPK
Next Generation Arms upper
Magpul ACS stock & MIAD grip
I picked up the lower a while back, not long before the market went nuts. A day or two later, I went back for an upper and they only had two: one black, one OD. The finish on the black one didn't match very well so I figured if I was going to mismatch, I might as well do it in two-tone style.
I have a "Don't Tread on Me" dust cover on order. The other parts will come when the budget and this insane market allow.