Designed exclusively to fit Holosun 407K/507K and any red dot with the same footprint, such as:
Leupold Delta Point Pro,
JP Enterprises JPoint,
Swampfox Sentinel,
ADE RD3-018 Spike,
ADE RD3-021 NUWA,
Shield RMS/RMSc/RMSw/SMS,
Riton X3 Tactix MPRD/MPRD2,
Sig Romeo Zero.