BUR #20609 has been approved by @nonamethanks.
remove alias barrett_m82a2 -> barrett_m82
mass update m82a2 -> -m82a2 barret_m82a2
They are visually and design-wise very distinct. M82 is standard configuration, while the Barrett M82A2 is indeed the bullpup one. See post #5578999 for example.
Updated