Reload With The Best M&P Magazine Extensions

The M&P Shield is a widely used sub-compact weapon, especially for concealed everyday carry. One of the most popular upgrades to the M&P Shield is a magazine extension. But people often seem confused about the benefits and drawbacks of using it.

To help clear this confusion, we will discuss the pros and cons of using an extended magazine with your Shield. We will also learn about the characteristics of a good mag extension and review the best ones on the market based upon those characteristics to assist you with your buying decision.

Best M&P Magazine Extensions Comparison Chart


Our Rating


Samson Manufacturing Corp - M&P Shield Magazine Extension

Pearce Grip - S&W M&P Grip Extension

Taylor Freelance - S&W M&P Shield Extended Magazine Pad

Pros and Cons of Using Extended Mags on the M&P Shield 

Using an extended magazine with the M&P Shield has its own pros and cons. Although when you buy an M&P Shield, it already comes with one flush and one extended magazine, you still will likely want to have some extras or some with larger capacities.


First, lets look at some of the advantages of having a magazine extension.

Extra Capacity: Using an extended magazine lets you carry more ammunition (at least one extra round) in a single magazine. This might not seem much, but it still gives you an edge for sure. The Shield is a small-sized weapon and it might take time to properly acquire a target (especially if you don’t have a laser or you are panicked), which means you can miss. Having an extra round will give you at least one extra shot before changing the mag.

Magazine Extension for Smith & Wesson M&P 380 Shield

Tackling Multiple Assailants: The Shield is generally carried for self-defense and you might end up in a situation where you face multiple attackers, with things escalating quickly if they are armed. Having some extra rounds in your mag will let you handle multiple targets without changing mags. Extended magazines are more tactical than regular magazines, as they add to capacity and control.

More Backup Rounds: Using Extended Magazines lets you carry more rounds for backup, meanwhile not increasing the number of magazines you carry. That’s probably the reason why S&W sells the Shield with an extra extended magazine. This will also let you save on extra weight if you tend to carry many magazines. Plus, if you are not in a situation to carry extra magazines, having an extension will probably help (like a home defense situation at night in your pajamas).

Finger Rest/Better Grip: The M&P Shield is a compact weapon and proper grip has always been an issue, especially for people with large palms. Plus, when you grab the weapon, your finger has no place to rest. An extended magazine serves as a finger rest and also facilitates a better grip over your weapon.


Now, lets look at some of the disadvantages of having a magazine extension.

Weight: Extended magazines improve the ammunition carrying capacity but it comes at the cost of extra weight. Using extensions increases the weight of the magazine, which might be a bit uncomfortable.

Balance: Due to the added weight beneath the grip, extensions can also interfere with the balance of the pistol as you shoot. However, with proper practice, you can overcome this.

Concealment: Mag extensions increase the length and size of your M&P Shield which may promote printing and cause concealment issues. Plus, some overly large extensions can also snag onto your holster, clothes, or other items.

Damage the Slide: A low-quality magazine extension can interfere with the ejector and the slide of your pistol, causing it to malfunction. Some extensions are not properly sized or machined to naturally accept the factory made spring.

Characteristics of our Top Picks

Based upon the pros and cons of using a magazine extension for the M&P Shield, we scoured the internet to handpick ones with ideal characteristics. You must have an eye out for these features whenever you are looking to buy an extension.

Prevent Over Insertion

A good magazine extension should properly replace the floor plate of the magazine so it doesn’t cause over insertion, jamming, or any other sort of malfunction due to incompatibility since this will cause the magazine to interfere with the slide which will result in serious damage.


A mag extension should be made of durable material to withstand spring tension and also rugged use. Magazine extensions are generally made from metal since they replace the magazine floor plate which, by the way, is also made from metal. Magazines tend to be dropped and dragged a lot, especially at the range, so your extension needs to be tough.

Maintain Balance

A good mag extension must not add much weight to the weapon, thus maintaining the equilibrium. All of our picks are made from lightweight and durable material, so they won’t add a considerable amount of weight to your weapon.

Proper Finger Placement

A mag extension should provide a proper rest for finger placement while you aim and shoot. This helps with countering the recoil of the weapon, by improving your grip over it.

Aesthetically Pleasing

The extension should blend in with the weapon aesthetics and should not look like a vague addition. Whether or not you are concerned with the looks of your M&P Shield, a chrome-colored extension on a black pistol will deter from the sleek, professional look f the weapon. Plus, it should also not affect the weapon’s concealability.

Quick Take - The Best M&P Magazine Extensions

Review of the Best M&P Shield Magazine Extensions 

You now know the pros and cons and the ideal characteristics to look for in a magazine extension for your M&P Shield. Now it's time to take a look at the best magazine extensions on the market and evaluate their features according to the above-mentioned norms.

1. Samson Manufacturing Corp - M&P Shield Magazine Extension

This M&P Shield magazine extension from Samson Corp has been made from high-grade aluminum, to provide strength and durability. The extension adds one more round to the factory seven and eight round magazines, hence increasing their capacity.

The relief cuts aid in the extraction of the magazine to clear Type III (double-feed) malfunctions and enables one-handed malfunction clearing. The edge of the extension is contoured and acts as a groove to rest your finger, thus improving your control over the weapon.

The mag extension has been designed to work flawlessly with the factory magazine spring. It won’t interfere with your hand while shooting and drops freely when the release is pressed.


  • Contoured Finger Rest
  • Easy to Install and Clean
  • Relief Cuts to Aid in Extracting
  • Durable Aluminum Construction
  • Fits both 9mm & .40 S&W M&P Shield Mags


  • Limited Capacity

Bottom Line

The mag extension from Samson is a durable addition to your magazine, available at an affordable price. It provides a comfortable finger rest and also helps you tackle the recoil of the weapon.

2. Pearce Grip - S&W M&P Grip Extension

This one here is just a magazine extension for your M&P Shield which doesn’t increase the round capacity. Made from high-grade polymer, it easily attaches to the base of your magazine and blends in with the contour and shape. The magazine extension helps with attaining better control over the weapon as you shoot.

The M&P Shield is not very big in size, so adding this accessory to your weapon will allow you to grip it more firmly. The extension features a slight shelf-type protrusion on the forend, which lets you wrap your finger around with ease. Being made from polymer, the extension doesn’t add any weight to the pistol.

Additionally, it is cut properly to ensure the magazine won’t catch or get obstructed while being pushed-in or dropped-out of the weapon. Considering its usability and in comparison with it with its minimal price, this is an enticing and worthy deal to capture.


  • Lightweight
  • Easy to Install
  • Extends Grip Length
  • Gives Better Control Over the Weapon
  • Fits both 9mm & .40 S&W M&P Shield Mags


  • Doesn’t Improve Capacity of the Magazine

Bottom Line

The Pearce Grip magazine extension is for you if you don’t want to disassemble and upgrade your magazine for an extra round. The extension is easy to install and improves your overall grip on the weapon, thus affecting accuracy.

3. Taylor Freelance - S&W M&P Shield Extended Magazine Pad

This M&P Shield Magazine Extension pad has been made from high-grade, machined aluminum with a satin black anodized finish, to be durable and aesthetically pleasing at all times.

The solid metal body of the extension can withstand drops and stomping without compromising with function. The base pad adds one round to the capacity of both seven and eight round magazines. It is also quite easy to install, as all you have to do is to simply remove the base pad. No sophisticated tools or gunsmith required.

The extension works really well and creates no problems with cycling. The base pad has the initials TF etched on it, along with a glossy black finish, which makes it look appealing.


  • Easy to Install
  • Aesthetically Pleasing
  • Lightweight and Durable
  • Fits both 9mm & .40 S&W M&P Shield
  • Coated For Resistance to Wear and Tear


  • Might Print With Pocket Carry

Bottom Line

The mag extension by Taylor Freelance is a durable and aesthetically pleasing upgrade, which also increases the capacity by one round. It is easy to adjust and lightweight. Plus, it functions flawlessly with sustained shooting sessions.


Having a magazine extension installed with your M&P Shield is a simple and affordable addition which improves the capacity, accuracy, and control over your weapon. This extra capacity gives you an edge in serious situations and also lets you carry more ammunition without adding much weight.

A good magazine extension should be made of durable material, provide a proper grip over the weapon, and prevent over-insertion of the magazine. Adding an extension to your M&P Shield magazine will make a good gun even better.

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