The Mossberg 514 Retrofit Kit – 14" Heavy Wall Barrel (RSR #92514) is a factory conversion kit designed for Mossberg 500®, 590®, and 590A1™ pump-action shotguns. This kit provides the essential components required to configure compatible Mossberg platforms with a compact 14-inch heavy-wall barrel assembly, delivering improved maneuverability and a compact defensive configuration.

The kit includes a 14" heavy-wall barrel with bead sight, magazine tube, action slide assembly, forearm, action nut, magazine spring retainer, and magazine cap—providing the key components required for the short-barrel configuration.

Engineered by O.F. Mossberg & Sons, the components are built to factory tolerances to maintain reliable function with the Mossberg 500-series pump-action system. The heavy-wall barrel profile enhances durability and heat resistance while the compact barrel length improves handling in confined environments.

This kit is commonly used for specialized defensive or tactical builds where compact firearm dimensions are desired. The Mossberg 500 series, first introduced in 1961, remains one of the most widely used pump-action shotgun platforms worldwide due to its reliability and modular design.

Important: Installing barrels shorter than 18 inches may fall under National Firearms Act (NFA) regulations depending on firearm configuration. Proper federal, state, and local laws must be followed before installation or assembly.

Features

• Genuine Mossberg factory retrofit kit

• Designed for Mossberg 500 / 590 / 590A1 shotguns

• 14-inch heavy-wall barrel

• Bead front sight

• Includes magazine tube and action slide assembly

• Synthetic forearm included

• Compact configuration for maneuverability

• Factory components for reliable fit and function