The Hiviz S400G is a member of the S-Series equipped with a magnetic front sight. This feature is designed to enhance visibility regardless of light conditions and simplify installation thanks to its magnetic base. The model comes with a single LitePipe that is available in two color variants: red or green.The S200 model is compatible with ribs ranging from .171\" - .265\" (11/64 - 17/64\"; 4.2 mm - 6.7 mm). This makes it suitable for a variety of models including but not limited to: Beretta\'s 686 and 687 with ultra narrow rib, AL390, A304, AL390 Field, 391 Urika Field; Browning\'s Gold Series, 28 ga., and .410 Citori; Sigarms\' SA-3 Hunter, SA-5 Upland; and Benelli\'s 20 ga.Moving on to the S300 model, it accommodates ribs measuring .218\" -.328\" (7/32 - 21/64\"; 5.5 mm - 8.3 mm). It\'s a perfect fit for field models such as: all Remington models; Browning\'s Gold 10 ga., BPS, Auto-5; Beretta\'s Comp., T and ST ribs, Pintail auto; Ruger\'s Red Label field guns; Ithaca\'s Model 37 and other models; Benelli\'s Super Black Eagle and all field guns; and Franchi\'s Field guns.Last but not least, the S400 model caters to ribs from .328\" - .437\" (21/64 - 7/16\