SHOTGUN SADDLE MOUNT Mossberg® 500 20GA – black


SOUSA Optics offers an extensive range of quality, affordable sporting optics. Manufacturing only the highest quality products that serious shooting enthusiasts demand to ensure trouble-free operation in the field.

In stock

SKU: SM4520 Category:


This picatinny saddle mount rail is constructed of a lightweight aircraft aluminum and has black non-glare finishing. The scope mount is designed to fit the Mossberg 500 20 gauge shotgun models. This mount kit easily installs using existing points on the firearm with no gunsmithing or altercations required. This picatinny rail expands the versatility and possible functions of your shotgun.


  • Full length picatinny rail
  • Perfectly contoured to receiver
  • Installs using existing ports
  • Made from lightweight aircraft aluminum
  • Satin black finish
  • Length: 7.5”
  • Width: 1.8”
  • Height: 2.2”
  • Weight: 5 oz
  • ASW Guarantee

SOUSA™ is a family-owned and operated business located in Fort Worth, Texas. We cater to hunting, outdoor recreational sports, military, and law enforcement. SOUSA products include riflescopes, binoculars, spotting scopes, and other optics and firearm accessories.

SOUSA™ Optics designs and makes precision aiming devices and firearms accessories for the most demanding shooters and outdoor enthusiasts. We pride ourselves on attention to detail and unrelenting standards throughout the research, design, manufacturing, quality control, and testing processes.

We bring the very best to the shooting community at an affordable price, and we stand behind our product with our ASW™ Absolute Satisfaction Warranty™. If you experience any issues with a product we make, we will repair or replace it at no cost. We don’t need a box, receipt, or a reason for the failure. No matter what happens to your SOUSA™ product, we will take care of it… period.

To Install:           BE SURE GUN IS NOT LOADED!             

  1. Pump slide back to expose ejector screw on inside of receiver.
  2. Remove gun’s ejector screw and replace with Sun Optics USA special ejector screw.
  3. Tighten securely (end of screw will protrude).
  4. Remove gun’s trigger plate pin (store original pins).
  5. Place shotgun mount over gun’s receiver so ejector screw protrusion is in base slot.
  6. Partially screw on ejector screw nut. (Do not tighten).
  7. Insert attach screw and tighten securely.
  8. Tighten ejector screw nut.
  9. After firing several rounds, examine screws and nuts for tightness.

Additional information

Weight 0.31 lbs
Dimensions 7.5 × 1.8 × 2.2 in