Authorized Distributor AIMPRO Tactical Fiber Optic            Front Sight Blades for Mossberg Factory Ghost Ring Sights Our New Fiber Optic Front Sight Blade is the only Fiber Optic direct replacement for Mossberg Factory Ghost Ring Sights Minor fitting may be required.  Available in 2 Heights  (Standard and Tall) Our All Steel Fiber Optic Front Blade can be fitted to the 500, 590, M590A1 and our new 930 models Our Fiber Optic Front Blades are in in production and available for order. $29.00 plus shipping  Please visit our On Line Store to place your order.