If you have a flared breacher barrel model, please see this product for the correct rail.
This compact rail system from Defender Tactical offers two, 4-slot picatinny rails for Mossberg 500/Maverick 88 12-gauge firearms. The Dual Rail is machined from solid 6061-T6 billet aluminum and is hard-coat anodized in Black for increased durability. A color-matched swivel screw and nylon washer are provided to easily attach the system over the Takedown Screw for a simple 30-second installation.
Fits most Mossberg 500/Maverick 88 series firearms with a drilled and tapped Takedown Screw, as shown in the picture below.
*Optics Shown Not Included*
