asuswrt-merlin
on SourceForge
RT-AX86U/Beta/RT-AX86U_386.7_beta1.zip
RT-AX58U/Beta/RT-AX58U_386.7_beta1.zip
RT-AX56U/Beta/RT-AX56U_386.7_beta1.zip
RT-AX88U/Beta/RT-AX88U_386.7_beta1.zip
asuswrt-merlin
on SourceForge
RT-AC3100/Beta/RT-AC3100_386.7_beta1.zip
RT-AC88U/Beta/RT-AC88U_386.7_beta1.zip
RT-AC68U/Beta/RT-AC68U_386.7_beta1.zip