Firearm purchases require a background check and must be picked up in person by the purchaser
SBR transfers will not be accepted 
Here are some specs for the Mossberg Model 500 12 gauge shotgun:
Gauge: 12 gauge
Chamber: 3-inch
Length: 47.5 inches
Length of pull (LOP): 14 inches
Trigger weight: 6.8 pounds
Overall weight: 6.5 pounds 
The Mossberg 500 is a pump-action shotgun with a variety of features, including: 
Dual extractors: Grip the cartridge's rim 
Dual action bars: Ensure reliable cycling 
Anti-jam shell elevator: Prevents jams 
Steel-to-steel lockup: The bolt locks into a barrel extension 
Ambidextrous, top-mounted safety: Easy to reach without moving your trigger finger 
Interchangeable barrels: Customize the shotgun for specific purposes 
Wide range of accessory barrels: Expand your shooting seasons 
Quick-release stock, forend, and recoil pad connectors: Easily switch shooting applications 
Bead and fiber optic sight offerings: Available for the 500 Field models 
The Mossberg 500 is versatile and can be used for: waterfowl hunting, upland birds, deer, home defense, and informal sporting clays