This Mossberg® 500/590 4X32 scope and mount combo kit features a tactical Picatinny saddle mount with shell holder and it is compatible with most Mossberg 500/590 12 gauge shotguns up to a 3.5" Chamber. The low profile saddle mount for your Mossberg 500/590 shotgun has See-thru feature V-cut on top picatinny rail for use of iron sights and two locking bolts included for replacing the original trigger pins. The mount is made from aircraft grade aluminum with matte black finish. The 4X32 compact scope has a Mil-dot reticle for fast target acquisition and three inch eye relief for flexible mounting. The scope is Milled from one solid piece of aircraft grade aluminum to withstand constant heavy recoil. The scope is fog proof rain proof and nitrogen charged with weather resistant seals. The scope has multi-coated lens provides superior light transmission, resolution and scratch resistance an windage and elevation adjustments. Scope lens covers and Weaver/Picatinny 1913 scope ring mounts are also included. Limited Lifetime Warranty.