The M&P 40 is a popular semi-automatic handgun. It is well known for its accuracy and reliability. Disassembling the arms will allow you to clean and maintain it. This guide will walk you through the steps necessary to disassemble the M&P 40. With the right tools and knowledge, you can easily and safely disassemble your M&P 40.
Safety Measures to Consider Before Disassembling
Disassembling any machine or piece of equipment can be a dangerous task if proper safety measures are not taken. It is essential to take the following steps to ensure a safe and successful disassembly process:
Familiarize Yourself with the Equipment: Before attempting to disassemble any piece of equipment, it is important to become familiar with the components and how they fit together. Take the time to study the manual and any diagrams associated with the equipment so you understand the function and assembly of the pieces.
Wear the Appropriate Protective Gear: Always wear safety glasses, gloves, and other protective clothing when disassembling equipment. This will help protect you from any sharp edges or flying debris.
Disconnect and Isolate the Power Source: Before beginning any disassembly process, make sure to disconnect and isolate the power source that is connected to the equipment. This will help to prevent any possible electric shocks or other dangerous situations.
Use the Proper Tools: Having the right tools for the job is essential for a successful disassembly process. Make sure to use tools that are designed for the specific machine or piece of equipment being disassembled.
Label and Document the Process: As you begin to disassemble the equipment, it is important to label and document the process. This will help you to properly reassemble the machine once the disassembly process is complete.
Have a Plan: Before beginning any disassembly process, it is important to have a plan of attack. Make sure you know the order in which you plan to disassemble the components. This will help to ensure a safe and successful disassembly process.
By following these steps, you can ensure a safe and successful disassembly process. Make sure to stay alert and take the necessary safety precautions to protect yourself and others around you.
Step-by-Step Guide to Disassembling an M&P 40
Step 1: Make sure your M&P 40 is unloaded and there are no rounds in the chamber. You can do this by ejecting the magazine and inspecting the chamber visually and with your finger.
Step 2: Remove the slide from the frame. This can be done by pulling the slide back and pushing down on the slide stop.
Step 3: Separate the barrel and recoil spring assembly from the slide. This can be done by pushing out the recoil spring plug and removing the recoil spring.
Step 4: Remove the barrel from the slide. This can be done by loosening the barrel retaining lug, which is located on the underside of the slide.
Step 5: Remove the extractor. This can be done by pushing out the extractor pin and then pulling out the extractor.
Step 6: Remove the firing pin and its spring. This can be done by pushing out the firing pin retaining pin and then removing the firing pin and its spring.
Step 7: Remove the sear and its spring. This can be done by pushing out the sear pin and then removing the sear and its spring.
Step 8: Remove the trigger bar and its spring. This can be done by pushing out the trigger bar pin and then removing the trigger bar and its spring.
Step 9: Reassemble the M&P 40 in the reverse order. Start by replacing the trigger bar and its spring, then the sear and its spring, then the firing pin and its spring, then the extractor, then the barrel, and then the recoil spring and its plug. Finally, reattach the slide to the frame.
Tips and Tricks to Make Disassembling Easier
Disassembling can be a tricky process, especially for those who are not experienced in this type of work. It is important to take the time to ensure that the process is done correctly and safely. Here are some tips and tricks to make disassembling easier:
Preparation: Before you start disassembling, it is important to make sure that you have all the necessary tools and safety equipment. Be sure to have a range of screwdrivers, nut drivers, pliers, and other tools that may be needed. Also, if you plan on disassembling any electrical components, make sure you are wearing safety gloves, protective eyewear, and a dust mask.
Understand the Parts: Before starting to take apart the item, it is important to have an understanding of the parts and how they fit together. This will make it easier to identify where each part needs to go when you are putting it back together.

Label Parts: As you start to take the item apart, it is important to label each part with a number or letter. This will make it much easier to reassemble the item later.
Take Photos: Taking photos of each step of the process can be very useful. This will help you remember where each part was and how it fits together.
Work Slowly: It is important to work slowly and carefully when disassembling any item. This will help to ensure that you don’t make any mistakes.
Following these tips and tricks will help to make the process of disassembling much easier and more efficient. By taking the time to understand the parts, label them, and work slowly, you can be sure that the item will be reassembled correctly.
Frequently Asked Questions [FAQs]
How do I prepare to disassemble a M&P 40?
Before attempting to disassemble a M&P 40, make sure it is unloaded and that the magazine is removed. Make sure that you are in a safe environment and clear your workspace of any other potential hazards.
What tools are needed to disassemble a M&P 40?
To disassemble a M&P 40, you will need a flat head screwdriver, a Phillips head screwdriver, and a mallet or rubber mallet. You may also need a torque wrench depending on the model.
How do I remove the slide and barrel from the frame of the M&P 40?
To remove the slide and barrel from the frame of the M&P 40, first take off the slide stop lever and slide the slide forward off the frame. Then, remove the barrel by unscrewing the barrel retaining pin and pulling the barrel out of the frame.
How do I separate the frame from the grip of the M&P 40?
To separate the frame from the grip of the M&P 40, first remove the grip screws from the frame. Then, use a mallet or rubber mallet to gently tap the frame away from the grip.
How do I remove the trigger assembly from the frame of the M&P 40?
To remove the trigger assembly from the frame of the M&P 40, first remove the trigger guard screws. Then, use a flat head screwdriver to gently pry the trigger assembly away from the frame.
How do I remove the magazine release from the frame of the M&P 40?
To remove the magazine release from the frame of the M&P 40, use a Phillips head screwdriver to remove the magazine release screw. Then, use a flat head screwdriver to gently pry the magazine release away from the frame.
How do I lubricate the parts of the M&P 40 after disassembly?
After disassembling the M&P 40, lubricate all of its parts with a high quality gun oil. Apply a small amount of oil to the slide rails, barrel, and other moving parts.
How do I reassemble the M&P 40 after disassembly?
To reassemble the M&P 40 after disassembly, begin by reassembling the frame and grip. Then, reassemble the trigger assembly, slide, and barrel. Finally, secure all of the screws and reattach the slide stop lever.
Conclusion
After completing the steps outlined in the guide, you should be able to successfully disassemble your M&P 40 pistol. Be sure to take your time and pay attention to how each part is connected so that you can properly reassemble it when you are finished. With the right tools and a little patience, you should be able to disassemble and reassemble your M&P 40 with ease.