BCM is the Tikka of ARs. Mass produced, barrels better than they should be, inexpensive but used by professionals. It's reasonable to expect them to hold (a real) just over a minute.
The cottage brands mentioned here are capable of reliably churning out sub-minute (real) "SPRs" or ARs designed to shoot 77gn rounds at distance.
FWIW, I've owned a lot and pared down to 2 lowers.
1) a Pic lower from PSA for running JAKL, BRN-180, and the like with folding stocks for the truck
2) an Aero M4e1 lower for running all of my traditional direct impingement uppers (BCM, White Oak, stuff I build, etc). I chose the Aero because it's forged not billet (better upper compatibility), and it has a tensioning screw that takes care of the tolerance gap between uppers and lowers which are not matched. If you're getting a matched receiver set, the ICON are a tremendous value.
-J