The Mossberg 500 Special Purpose is a pump-action shotgun in 12 gauge with a 3-inch chamber and an 18-inch barrel. Overall length is 39.5 inches and weight is 6.75 lbs. The aluminum alloy receiver has a Parkerized finish, and the synthetic stock is black. Capacity is 5+1 rounds. 
 

Key Specifications 

• Model: 500 Special Purpose 
• Brand: Mossberg 
• Caliber/Gauge: 12 GA 
• Action Type: Pump Action 
• Barrel Length: 18 inches 
• Chamber Size: 3 inches 
• Capacity: 5+1 rounds 
• Overall Length (OAL): 39.5 inches 
• Weight: 6.75 lbs (108 oz) 
• Stock Material: Synthetic with Black Finish 
• Receiver Material: Aluminum Alloy with Parkerized Finish 
• Sights Type: Dual Bead Front Sight 
• Safety Mechanism: Top Tang Safety 
   

Detailed Features 

 
The pump action is deliberately simple — no gas system or inertia mechanism means fewer parts that can fail. The fixed pistol grip stock works well in confined spaces. At 6.75 lbs the gun is not tiring to hold for extended use, and the aluminum alloy receiver with synthetic stock handles wet conditions without issue. Dual bead sights give a quick reference for barrel alignment. The top tang safety lands under the thumb naturally with a proper grip. 
 

Usage Scenarios 

• Home defense: The 18-inch barrel keeps overall length manageable in tight hallways, and the 5+1 capacity covers most situations. 
• Range work: The gun runs reliably through a variety of 12-gauge loads and the pump action is straightforward to practice. 
• Small game and hunting: The 3-inch chamber accepts standard hunting loads.

The Mossberg 500 gets consistent positive feedback for reliability. Most owners report it cycles everything from light target loads to heavy buckshot without issues, which is the main thing people care about in a home defense gun.

The pump action gets favorable marks for being simple to learn. New shooters tend to pick it up quickly, and the top-tang safety placement works naturally with a proper grip. Customization comes up often — there is a large aftermarket for stocks, lights, and accessories, so owners adapt the gun fairly easily for their specific use.

The main complaint is 12-gauge recoil, particularly with heavier loads. It is manageable for most shooters but noticeable for anyone who is recoil-sensitive. Most experienced owners just recommend practicing with standard loads before moving to heavy buckshot or slugs.

Overall the 500 is one of the more widely recommended pump shotguns in its price range, and most owners are satisfied with its durability and no-fuss operation.