The Mossberg 500 shotgun's robust design and versatility have made it a favorite among hunters, sport shooters, and home defenders for decades. A critical component of its functionality is the action tube, often overlooked but essential for reliable operation. This guide delves into the Mossberg 500 action tube, exploring its purpose, common issues, and maintenance.
Understanding the Mossberg 500 Action Tube
The action tube, located beneath the barrel, houses the magazine spring and follower, feeding shells into the action for firing. It's a relatively simple yet crucial part, responsible for the smooth and reliable cycling of ammunition. A malfunctioning action tube can lead to misfeeds, jams, and ultimately, unsafe operation.
Key Functions of the Action Tube:
- Shell Storage: The action tube securely holds the shotgun's shells, providing a reliable supply of ammunition. The capacity varies depending on the barrel length and magazine extension tube (if installed).
- Shell Feeding: The spring and follower within the action tube work together to push shells up towards the bolt for chambering.
- Structural Integrity: The action tube contributes to the overall structural integrity of the firearm, providing support for the barrel and receiver.
Common Problems with the Mossberg 500 Action Tube
While generally durable, the action tube can encounter issues over time, often stemming from neglect or misuse.
1. Damaged Spring:
A weakened or broken magazine spring is a common problem, resulting in unreliable feeding. This typically manifests as shells failing to feed properly or jamming. A weak spring might not provide enough force to push shells up consistently.
2. Worn or Damaged Follower:
The follower, a component that interacts with the shells, can wear down or become damaged. A damaged follower can interfere with smooth shell feeding, causing jams or malfunctions.
3. Dirt and Debris Buildup:
Dirt, debris, and other contaminants can accumulate within the action tube, hindering the smooth operation of the spring and follower. This often leads to feeding problems.
4. Bent or Damaged Action Tube:
In cases of significant damage or misuse, the action tube itself may become bent or damaged. This requires professional repair or replacement.
Maintaining Your Mossberg 500 Action Tube
Regular maintenance is key to preventing problems with your Mossberg 500 action tube and ensuring reliable operation.
Routine Cleaning and Inspection:
- Regularly clean the action tube: After each shooting session, remove the action tube and clean it thoroughly, removing any dirt, debris, or residue.
- Inspect the spring and follower: Check for signs of wear, damage, or breakage. Replace these parts as needed.
- Lubricate the action tube: Apply a light coat of gun lubricant to the action tube to prevent rust and corrosion and to ensure smooth operation.
Addressing Specific Issues:
If you encounter feeding problems, carefully diagnose the root cause. It may involve a simple cleaning, replacing a worn part, or, in more serious cases, requiring a gunsmith's attention. Remember, attempting repairs beyond your skill level could lead to damage or injury.
Conclusion
The Mossberg 500 action tube is a vital component of this popular shotgun. Understanding its function, potential problems, and proper maintenance will ensure years of reliable and safe operation. Regular cleaning, inspection, and timely replacement of worn parts are crucial for maintaining your firearm's performance. If you are unsure about any aspect of your Mossberg 500 maintenance, consult a qualified gunsmith.
