Hiviz M300 Narrow Magnetic Fiber Optic Front Shotgun Sight - M300

Narrow Model fits ribs from .218"e; to .328"e; (7/32"e; to 21/64"e;) (5.5mm to 8.3mm).
LitePipe Colors: Green 0.135, green 0.175, red 0.135, two tone 0.175
Snap-on magnetic base