The Mossberg 590S Compact OR is a 12 gauge pump-action shotgun with a 3" chamber, 18.5" barrel, 6+1 capacity, and 37.75" overall length. It weighs 6.75 lbs. The synthetic stock has an adjustable length of pull. Safety is ambidextrous. Barrel finish is matte blued; receiver and stock are black. 
 

Key Specifications 

• Brand: Mossberg 
• Model: 590S Compact OR 
• Caliber: 12 Gauge 
• Capacity: 6+1 rounds 
• Barrel Length: 18.5 inches 
• Overall Length: 37.75 inches 
• Weight: 6.75 lbs 
• Action Type: Pump Action 
• Chamber Size: 3 inches 
• Sights Type: Bead Sights 
• Stock Material: Synthetic with Adjustable Length of Pull (LOP) 
• Safety Feature: Ambidextrous safety switch 
• Finish Color: Matte Blued Barrel; Black Receiver & Stock 
   

Detailed Features 

The adjustable-LOP synthetic stock lets you dial in the fit rather than shooting whatever length came from the factory. At 6.75 lbs and 37.75" overall the gun is genuinely compact, which helps in tight spaces. The ambidextrous safety works for left- and right-handed shooters without any modification. Bead sights keep target acquisition simple and fast. The pump action cycles reliably across different shell lengths. The 590S designation means it accepts mini, standard, and 3" shells interchangeably.

The 590S Compact OR draws praise from homeowners and tactical-minded shooters who want a short, manageable shotgun. Compact size and the adjustable stock get the most consistent positive mentions. The 6+1 capacity is well-regarded for the gun's size, and Mossberg's cycling reliability reputation generally holds up in owner reports.

Weight comes up as a minor criticism. A few owners note 6.75 lbs is heavier than expected given the compact dimensions. New shooters sometimes underestimate the recoil of 12 gauge loads in a gun this light. Aftermarket accessory options are considered good but not exhaustive. Some owners want more finish color choices.