H&K MR762 Problems And Their Solutions

The H&K MR762 is a popular rifle due to its impressive features and functionality.

However, like any other firearm, it can encounter problems that may affect its performance. As gun enthusiasts, we understand the frustration you may experience when your firearm fails to function correctly.

We created this blog post to provide solutions to common H&K MR762 problems so that you can get the most out of your firearm without any hiccups.

Some of the most common problems with HK MR762 are Failure to feed, Cycling issues, Failure to eject, Trigger Problems, Loading Problems, Short stroking issues, and Bolt carrier group sticking.

This blog post aims to provide firearm enthusiasts with a comprehensive guide to solving common H&K MR762 problems.

H&K MR762 Problems

When it comes to firearms, safety is always paramount. Therefore, we highly recommend that you seek professional assistance if you are not confident in performing any of the solutions outlined in this post.

We look forward to solving common H&K MR762 problems, so you can get the most out of your rifle and enjoy a safe and satisfying shooting experience.

Quick Overview Of Specs

Specification Details
Caliber .308 Winchester/7.62x51mm NATO
Action Semi-automatic
Barrel Length 16.5 inches
Weight 9.84 pounds (empty)
Magazine Capacity 10 or 20 rounds
Sights Flip-up iron sights
Trigger Two-stage match trigger

Common H&K MR762 Problems And Their Solutions

1. Failure to Feed

One of the most common problems with this rifle is the failure to feed, and many users reported this issue even using Remington Core-Lokt ammo.

This problem can be frustrating and even dangerous in certain situations. Knowing the main causes of this malfunction is crucial for preventing such issues from occurring.

Dirty or lubrication issues are often the culprits behind failed feeds. Excessive grime or lack of lubrication can cause the moving parts to slow down or even stick, preventing the proper cycling of the rifle.

Regular cleaning and lubrication can go a long way in preventing this problem.

A weak recoil spring can also contribute to failure to feed. This can cause the rifle to cycle too slowly, resulting in jams and other malfunctions.

Replacing the recoil spring with a new, stronger one can help to mitigate this issue.

Chamber obstructions can also lead to failed feeds.

Debris or even excess lubricant can accumulate inside the chamber, preventing the proper seating of the cartridge.

By thoroughly cleaning the chamber and removing any debris, you can help ensure proper function.

Lastly, ammunition problems can also lead to failure to feed. Damaged or improperly sized cartridges can cause jams and other malfunctions.

Ensuring your ammunition is high quality and properly sized can help prevent this issue.

To address these issues, start by thoroughly cleaning and lubricating the rifle. Check the recoil spring for signs of weakness and replace it if necessary.

Inspect the chamber for any obstructions and clean as needed. Finally, ensure that your ammunition is of high quality and properly sized for your rifle.

To break in a new MR762 firearm, it’s recommended to put two rounds of 168 or 175 into the mag and then fire them off. You should get the bolt lock back.

This process helps to break in the firearm and ensure proper function. After firing off about 100 rounds, the recoil spring should be well broken in and good to go.

Source; https://www.hkpro.com/threads/hk-mr762a1-failure-to-feed.440369/

2. Failure to Eject

Do you have experience with firearms? Have you ever encountered a problem known as Failure to Eject? If yes, then you might be aware of the frustration that comes with it.

Imagine firing a round, and instead of smoothly ejecting the spent cartridge casing, it gets stuck in the chamber. Frustrating.

Failure to Eject is a common problem faced by firearm users, and it can occur due to various reasons. Dirty extractors are one of the significant causes of Failure to Eject.

When carbon builds up, it can cause the extractor to stick, making it difficult to remove spent casings.

Another common cause is a Stovepipe Jam, in which the ejected casing fails to exit the ejection port and gets trapped in the slide or bolt carrier group.

Faulty extractor problems are another culprit, where the extractor may fail to engage the cartridge casing and pull it out when the round is fired.

Magazine issues can also cause Failure to Eject, such as a magazine that doesn’t feed rounds correctly.

Luckily, there are steps you can take to fix these issues. If you face the problem of a dirty extractor spring, field stripping your firearm and cleaning its internal components using solvents and alcohol can help.

Tap and rack your firearm’s slide for Stovepipe Jam to expel the stuck casing.

In case of extractor problems, replacing the extractor or the extractor spring can solve the issue.

Finally, for magazine-related failures, try cleaning the magazine or using a different brand to ensure it feeds rounds correctly.

3. Cycling Issue

Dear readers, have you ever experienced cycling issues with your rifle? If so, you must know how frustrating it can be.

Fortunately, there are several reasons why this issue arises, and even better, there are simple steps you can take to fix them!

One of the main causes of cycling issues is the use of low-quality ammunition. Cheaper ammunition may not have enough power to cycle the gun, leading to malfunctions properly.

To fix this issue, switch to better-quality ammunition, especially if you plan on going through long-range shooting.

Another cause of cycling issues is dirty or inadequate lubrication. If your gun is not lubricated enough or if there is dirt in the working parts, it can negatively impact the cycling of the rifle.

First, clean the gun and remove any debris to improve its functioning. Another option for achieving better results is to oil the buffer spring lightly.

After that, make sure to lubricate the gun appropriately with high quality lubricant to ensure smooth and consistent cycling.

Another factor that can cause cycling issues is gas system problems. If the gas system is clogged or damaged, it can impact the gun’s performance.

The gas system must be thoroughly cleaned and checked for damages to fix this issue. Please take it to a professional for proper handling.

A worn-out recoil spring can also cause cycling issues. If the spring is not working properly, it can prevent the gun from cycling correctly.

The solution is to replace the spring with a new one, which is a relatively easy process.

Finally, faulty or improperly loaded magazines can also cause cycling issues. If the magazines are not feeding the ammunition properly or if they are not inserted correctly, then the gun won’t be able to cycle correctly.

Ensure the magazines are in good working order and properly loaded before use.

4. Loading Problem

Many owners of MR762 reported that they are experiencing loading problems frequently.

Loading problems can occur due to several reasons, such as magazine issues, ammunition problems and broken extractors among others.

If you’re facing problems with your magazine, you may need to inspect it for any damage or wear and tear.

Often, magazines become damaged due to frequent usage, so replacing them with new ones is important to ensure optimal functionality.

On the other hand, if you’re experiencing ammunition problems, even with high-quality brands such as 175gr Match Federal, you may want to check the ammunition carefully.

The rounds may be deformed or damaged, leading to loading issues.

Additionally, a dirty chamber or bore can cause jams, so you may want to ensure they’re clean and debris-free.

Another common issue that can cause loading problems is a broken extractor.

The extractor is responsible for grabbing the spent round out of the chamber and helps load another round. If your extractor is broken, you’ll need to replace it to resolve the problem.

Finally, recoil spring issues can also lead to loading problems. After each shot, the recoil spring returns the slide or bolt to its original position.

A weakened or damaged recoil spring can lead to cycling problems, so you must replace it to get your rifle back in top form.

5.  Short Stroking Problem

This problem can be frustrating and even dangerous. Short stroking occurs when the rifle’s bolt carrier group fails to travel the entire length of the receiver, which prevents the firearm from cycling properly.

If left unaddressed, this issue can cause a failure to eject or feed, rendering your firearm useless.

The causes of short stroking can be attributed to several factors, including a dirty or fouled rifle, insufficient lubrication, and a malfunctioning barrel fuel valve or fuel barrier.

The barrel fuel valve is responsible for metering the gas flow from the barrel to the piston system; the rifle won’t cycle correctly if it fails to function properly.

Similarly, the fuel barrier protects the piston system from contamination. If it’s damaged or missing, it can lead to short stroking.

So, what steps can be taken to fix these issues? The first step is thoroughly cleaning the rifle, paying special attention to the piston system, gas block, and barrel fuel valve.

Next, check the fuel barrier for any signs of damage or wear, and replace it if necessary. Ensure that the rifle is properly lubricated, which will help it function smoothly and reduce friction.

If the problems persist, consider consulting with a gunsmith or the firearm’s manufacturer to ensure the rifle operates as intended.

6. Bolt Carrier Group Sticking

One of the main culprits of bolt carrier group sticking is a lack of lubrication. Without proper lubrication, the metal components of the BCG can heat up and cause friction, ultimately leading to sticking.

Another cause of BCG sticking is carbon buildup.

Residual carbon can accumulate when firing rounds, creating a buildup that inhibits BCG movement.

Incorrect buffer or buffer spring can also be to blame for BCG sticking. Using too heavy or light buffer for your specific firearm can result in slow BCG movement and sticking.

Finally, gas system issues can play a role in BCG sticking, particularly if the gas block isn’t functioning properly.

Fortunately, there are several steps you can take to address BCG sticking. Firstly, regularly clean and lubricate your firearm to prevent buildup and promote smooth BCG movement.

If you suspect your buffer or buffer spring might contribute to the issue, try adjusting them to find the appropriate weight for your firearm.

If all else fails, seek professional help from a firearms expert to diagnose and fix gas system issues.

Remember, proper maintenance and upkeep of your firearm is key to avoiding the aggravation of bolt carrier group sticking.

7. Trigger Problem

The most common culprits of trigger problems include a dirty extractor spring, trigger spring issues, dirty or fouled trigger components, and ammunition issues.

If you’re experiencing trigger problems due to a dirty extractor spring, the first step is to remove the bolt carrier group from the firearm.

Clean the extractor spring thoroughly using a brush and cleaner like CLP. Once the extractor spring is clean, reassemble the bolt carrier group and test-fire your firearm.

Trigger spring issues can often be fixed by replacing the spring altogether.

Consult your firearm’s manual or a qualified gunsmith for specific recommendations on the type of spring to use and how to replace it properly.

If your trigger components are dirty or fouled, disassemble the trigger group and clean each component thoroughly with a brush and cleaner.

Once each component is clean, reassemble the trigger group and test fire your firearm.

Finally, ammunition issues can also cause trigger problems. If you’re experiencing issues with your ammunition, try using a different type or brand to determine if the issue is with the ammunition, not the firearm.

Keeping your firearm clean and well-maintained is crucial to avoid trigger problems and ensure your firearm functions properly. If you’re unsure how to address trigger issues, consult a qualified gunsmith.

What Do The User Think About H&K MR762

After conducting research and analyzing user reviews and comments, it’s evident that the H&K MR762 has garnered a mix of user reactions.

Some users have reported a positive shooting experience with the firearm, praising its accuracy, reliability, and comfortable grip. They have also applauded the rifle’s sleek design and easy-to-handle features.

On the other hand, some users have expressed disappointment in the firearm’s overall performance and have noted that it’s quite heavy to carry around.

Another issue cited by a few users is the MR762’s high cost, which is not affordable for everyone.

It’s worth noting that most users who reported issues with the firearm have mentioned that H&K’s customer service was responsive and helpful in resolving any problems.

While there have been some critical voices, the H&K MR762 appears to be a reliable and accurate rifle enthusiasts’ favor. However, its high cost and weight may not be the most practical rifle for everyone.

3 Best Alternatives To H&K MR762

When it comes to tactical firearms, the H&K MR762 is a notable choice for any gun enthusiast. However, a few other guns on the market can give it a run for its money.

Here are the top three best alternatives to the H&K MR762:

1. FN SCAR 17S –

This rifle is incredibly popular among the US Military and the many Special Forces units worldwide. It’s known for its exceptional durability, reliability, and accuracy.

The SCAR 17S has a semi-automatic operation and boasts a 16-inch steel barrel with a quick-detach design for easy maintenance. Additionally, the SCAR 17s uses either 10-round or 20-round box magazines for added versatility.

2. Daniel Defense DD5V1 –

The Daniel Defense DD5V1 is another rifle worth considering as an alternative to the H&K MR762. It has a 16-inch barrel, made out of chrome-moly vanadium steel that’s chrome-lined and equipped with DD’s patented cold-hammer forging process.

The DD5V1 has great accuracy and is known for its reliability in high-stress situations, making it a favorite among law enforcement officers.


The LWRCI REPR MKII is a high-quality rifle that features a 20-inch spiral-fluted barrel made from cold-hammer-forged stainless steel.

This rifle is semi-automatic but has a shooting range of over 1000 meters. This gun is known for its exceptional accuracy, making it ideal for long-range shooting, tactical situations, and precision hunting.

Overall, these three guns offer excellent alternatives to the H&K MR762. They offer exceptional durability, reliability, and accuracy, making them top choices for tactical gun enthusiasts.

Frequently Asked Questions

What is the caliber of the rifle?

It fires a .308 Winchester/7.62mm NATO cartridge.

What is the length of the barrel?

It features a 16.5-inch cold hammer forged barrel.

4. Is the rifle suitable for hunting?

Yes, it is a highly accurate and reliable rifle that can be used for hunting.

What is the magazine’s capacity?

The capacity of 20 rounds.

What types of optics can be used with the rifle?

Red dot sights, scopes, and holographic sights.


We have listed all the common problems with H&K MR762 rifles and proper instructions on how to fix them yourself. If you persist in some problems, we recommend you get a gunsmith’s help.

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