I want to start a list of devices that allow the AR-15 BCG to be locked or released w/o breaking firing grip. The intent is to simply gather data in this thread - it is not to discuss the merits of any of these devices beyond comparing them to each other and how effectively they do what their manufacturers claim they do. These can be lever devices or even complete lower receiver designs.
1. MagPul BAD Lever (lock and release)
2. Boonie-Packer Redi-Catch *discontinued* (lock)
3. A Revelation Engineering FCD
4. Troy Industries Ambidextrous Bolt Release
5. KAC IWS lower
6. Tactical Link - lock & release
7. AXTS AX556 - lock & release
8. AXTS A-DAC-F - lock only