Top 5 FN 502 Problems & How To Solve Them

Responsible firearm ownership begins with profoundly understanding your weapon’s capabilities and limitations.

The FN 502 is a trusted companion for many shooters, but even the most reliable gun can malfunction if not properly maintained and handled.

You’re likely to face many 5 FN 502 problems like feeding, extraction, and slide lock malfunctions.

From personal experience, I can tell you that proactive maintenance and troubleshooting are essential for a safe, more enjoyble shooting experience.

In this article, I’ll talk about common issues with the FN 502 and provide¬†troubleshooting tips.

Problems & Solutions at a Glance

5 ProblemsWith Their Quick Solutions
Feeding IssueClean, lubricate, and use compatible ammo for resolution.
Extraction ProblemClean extractor, adjust spring, check ejector, test ejection.
Slide Lock ProblemInspect slide lock lever for damage, lubricate, and test.
Magazine ProblemClean, inspect springs, and check magazine catch for resolution.
Grip ProblemAdjust grip for comfort, consider tape or stippling.
FN 502 Problems
FN 502 Problems

FN 502 Problems With Their Practical Solution:

1. Feeding Issue:

At times, the bullets don’t feed smoothly into the chamber, causing hiccups during shooting.

This can lead to jams, with bullets getting stuck halfway or not fully seated in the chamber.

When the magazine isn’t sliding smoothly or doesn’t correctly seat in the gun, it can result in a stall or non-operational state.


Magazine issues are often solved through:

  • Thorough cleaning to prevent dirt and debris accumulation.
  • Cleaning the feed ramp ensures a smooth transition of bullets into the chamber.
  • Using high-quality lubricant on moving parts reduces friction and improves function.
  • It’s important to use compatible ammo.

I’ve seen significant improvement in the range after applying these solutions and making minor adjustments for a smoother experience.

2. Extraction Problem:

One issue that plagues shooters is the extraction problem.

This occurs when the spent casing isn’t efficiently ejected after firing, causing a stovepipe or a jam that renders the firearm unusable.

If the slide gets caught, it can lead to stovepipe situations, requiring a quick response to clear the jam.

Using the gun with this issue in mind can be a significant hindrance, and adjustments are needed for smooth operation.


To tackle this issue, focus on meticulously cleaning the extractor and surrounding area.

Accumulated grime can affect function, so keeping it clean is crucial. Swapping out the spring for proper tension can also help.

Check the ejector to ensure it’s in good shape, and give the spent casing a good kick for proper ejection. Subsequent tests should be performed to confirm the fixes.

3. Slide Lock Problem:

Another challenge of the slide lock issue is that it’s a pain when the firearm fails to lock back after firing off a round.

This leaves the slide home and shooters bewildered, wondering about the status of the weapon.

It is a safety issue and can also mess with the focus and timing during shooting.

The slide lock issue is the last thing anyone wants to deal with, especially in high-pressure situations.


Inspect the slide lock lever for damage or excessive wear to find the right solution. If necessary, consider replacing it.

Ensure it’s properly lubricated to prevent friction, and check the spring for weakness or faults. Ensure the lever is in the correct position to properly engage with the slide.

Field tests are essential to determine if corrective measures have worked. Trying different solutions helps you find what works best for you, as in Mossberg MC2SC problems.

4. Magazine Problem:

This can lead to feeding issues, where rounds may nose-dive or have trouble aligning correctly, disrupting the shooting process and overall experience.

The magazine can be the culprit behind these issues, causing rounds to fail to lock in place or even dropping out unexpectedly, which can be pretty jarring mid-session.


For a solution, here are the several steps you have to take:

  • Thorough cleaning: Cleaning the magazine inside and out removes dust and debris that may disrupt rounds’ alignment and cause friction.
  • Examine springs: Check the springs for proper tension, which can affect the feed rate. Replace worn springs if necessary.
  • Check magazine catch: Ensure the magazine catch is locked in properly. Replace a worn catch or make adjustments as needed.

Also, ensure the magazine reliably locks into place and feeds rounds without issues. Once fixed, the magazine-fed rounds like a charm and feeding issues were passed.

5. Grip Problem:

Grip issues can be a significant problem. The factory grip often felt slick, especially with dry hands, making handling the firearm challenging.

A sense of shifting, even slightly, in the hands during a rapid-fire can lead to a poor grip and reduced accuracy, which is not only frustrating but also a safety hazard.

In the worst-case scenario, this can result in severe consequences.


Struggling with grip issues on the FN 502? Consider these solid fixes:

  • Grip adjustments: Make necessary modifications for better comfort and accuracy.
  • Grip tape: Apply adhesive-backed, sandpaper-textured tape to the handle for a tactile surface.
  • Stippling: Create indentations on the grip surface for a more permanent solution.
  • Aftermarket grips: Invest in grips that offer stability and comfort.

These modifications ensure a rock-solid grip, enhancing your shooting experience.

Read More: Top 5 Remington 1911 R1 Problems: Solve the Puzzle

My Conclusion:

Now let’s sum up!

The FN 502 is not doubt a solid piece of craftsmanship with enticing features. But you can encounter several issues, including feeding, extraction problems, and grip difficulties.

However, this doesn’t lead to a dead end. Through optimization and my tips that I shared above, you can resovle these issues. Just pay attention to cleaning, lubrication, and occasional part replacements.

Remember, with proper attention and care, the FN 502 proves to be a reliable and efficient tool for firearm enthusiasts right out of the box.

My Friends Feedback:

My friend, a seasoned pistol instructor who has taught people of all ages, encountered various issues while training with the FN 502. He noticed rounds getting stuck in the chamber and had concerns about the extractor.

Despite being under warranty, he found the mag release button and magazines causing unexpected problems like pins falling out and the trigger group annoyance. However, he managed to resolve some of these issues using purple lock tight.

He also compared the FN 502 with other pistols like the Sig p322 and Glock 44, noting cosmetic wear patterns and abnormal ejection patterns, especially with hot brass.

Another experienced shooter friend praised the pistol’s red dot sight but found it finicky and requiring constant cleaning and lubrication. He noticed wear marks on the optics and front sight pins and abnormal wear patterns on the slide.

Despite these issues, he loved shooting with it, especially with .22 ammo. However, he faced failures to feed and eject, grouping issues, and occasionally had the slide stuck.

He recommended keeping the pistol clean and the optic plate screws tight to avoid further problems. Some friends agreed that the FN 502 is a fun and accurate firearm, especially when paired with a suppressor.

They highlighted its accuracy with standard velocity ammo and the fun they had shooting at the range. However, they acknowledged that some troubleshooting and patience may be required to get it running smoothly.

FN 502 Problems
FN 502 Problems

Common Questions Asked About FN 502:

How accurate is the FN 502?

The FN 502 demonstrated excellent accuracy, consistently producing tight groupings with three or four bullet-holes touching out of five shots at 25 yards. Notably, Federal’s defensive round achieved the best performance of the day, with a remarkable 1.17-inch five-shot group.

Can you dry fire FN 502?

Regularly dry firing your FN 502 pistol may damage the firing pin or barrel. Snap Caps, inert chamber inserts, are available for safe practice without live ammunition.

Will a vortex viper fit a fn 502?

Yes, the Vortex Viper 1x24mm 6 MOA Red Dot Sight utilizes the Docter footprint, making it compatible with the Noblex/Docter adapter plate provided with your FN 502.

How many rounds does a FN 502 hold?

Offering a high-capacity 15-round magazine, this firearm is designed for easy loading with its durable polymer and steel construction. The package includes both a 10-round and a 15-round magazine for versatility.

Does FN 502 fit in 509 holster?

The ANR appendix holster is compatible with the FN 509, 509 Tactical, 509C, and 509M models. It’s designed to accommodate optics, suppressor-height sights (up to 0.450″ tall), and threaded barrels.

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