The Mossberg 500 and 590 shotguns are renowned for their reliability, versatility, and ease of maintenance. A crucial component of these shotguns is the slide tube assembly, which houses the shell carrier and plays a vital role in feeding ammunition. This guide focuses specifically on the 7-3/4" slide tube assembly, providing detailed information on its function, common issues, and potential solutions.
Understanding the Mossberg Slide Tube Assembly
The slide tube assembly isn't just a simple tube; it's a precisely engineered part that interacts with several other components within the shotgun's action. Its primary functions include:
- Holding Shells: It securely stores and positions shotgun shells for feeding into the chamber. The length of the tube (in this case, 7-3/4") dictates the shotgun's magazine capacity.
- Feeding Shells: The tube interacts with the shell carrier and bolt to ensure smooth, reliable feeding of shells into the chamber during operation.
- Maintaining Alignment: The tube helps maintain the alignment of shells within the magazine, preventing jams and malfunctions.
A 7-3/4" slide tube assembly is commonly found on Mossberg 500/590 shotguns configured for shorter barrels or those intended for specific purposes where a reduced capacity is desired. It’s important to verify the correct length for your specific firearm model before purchasing any replacement parts.
Common Issues with the Slide Tube Assembly
While generally robust, the slide tube assembly can occasionally encounter problems:
1. Feeding Problems:
- Shell Jams: This could be due to bent or damaged components within the assembly, or insufficient lubrication. Inspect the tube for any obstructions or damage.
- Poor Shell Alignment: Check for wear and tear on the tube's interior, which could affect shell alignment.
- Failure to Feed: This might indicate a problem with the shell carrier or other interacting parts, not solely the slide tube itself.
2. Wear and Tear:
- Scratches and Dents: While superficial scratches might not significantly impact functionality, deep dents can obstruct shell movement.
- Corrosion: Exposure to moisture can lead to corrosion, affecting the smooth operation of the assembly. Regular cleaning and lubrication are crucial.
Troubleshooting and Maintenance
Addressing issues with the slide tube often involves a combination of inspection and cleaning:
1. Thorough Inspection:
Disassemble the slide tube assembly carefully, inspecting each part for damage, wear, or foreign objects. Refer to your Mossberg owner’s manual for correct disassembly procedures.
2. Cleaning and Lubrication:
Clean the slide tube thoroughly using a suitable gun cleaning solvent and brush. Pay close attention to the inside of the tube. Once clean, apply a high-quality gun lubricant to the tube's interior and all moving parts.
3. Replacement:
If you find significant damage, such as deep dents or corrosion, replacing the entire slide tube assembly is often the best course of action. Always ensure you purchase a replacement part that is the correct length (7-3/4") and specifically designed for your Mossberg model.
Conclusion
The Mossberg 500/590 slide tube assembly is a vital component for reliable shotgun function. Regular cleaning, lubrication, and careful inspection can prevent many common problems. Understanding its function and potential issues will help you maintain your shotgun and ensure years of reliable performance. Remember to always consult your owner's manual for detailed instructions on disassembly, cleaning, and maintenance procedures. Improper handling can lead to injury.
