Manufacturer: Hiviz TO200
Magnetic mounting system, no gunsmithing required. Dual fiber optic light pipes can be reversed. Two LitePipes (one orange and green round, one orange and green triangle).
TO200: fit ribs from .171" - .265" (11/64 - 17/64"; 4.2 mm - 6.7 mm). Fits Beretta: 686 & 687 models with ultra narrow rib, AL390, A304, AL390 Field, 391 Urika Field; Browning: Gold Series, 28 ga. and .410 Citori; Sigarms: SA-3 Hunter, SA-5 Upland; Benelli: 20 ga.