Top 5 Best AR 15 Armorer’s Wrench: Smith Enterprise, Arrington or Brownells (2021 Reviews)

best AR 15 armorer's wrench

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best AR 15 armorer's wrench

An armorer’s wrench is essential for all the activities, including installing or dismantling ARs. There are approximately 100 options on the market so far. Typically, having the best AR 15 armorer’s wrench is like you are having one of the best supporting tools on hand. In this article, we will give you a list of the five best AR 15 armorers wrench on the market so far.

Top 5 Best AR 15 Armorer’s Wrench 2021

1. A-KARCK Locknut Spanner Multi-Function Sport

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If you are looking for the best AR 15 armorer’s wrench to install household accessories or devices by yourself, the A-KARCK Locknut Spanner Multi-Function Sport is a perfect tool. Most users praise the unit’s sturdiness and high performance. This tool does an ideal job of tightening up all types of nuts and bolts and makes sure they stayed long-lasting secure.

The tool has numerous five-star reviews for its fantastic durability and well-construction. Indeed, the wrench is made from high-quality stainless steel with black oxidized from head to toe. Hence, the strength of the unit is always at the highest level, at least on our list.

The A-KARCK Locknut Spanner Multi-Function Sport is compatible with most kinds of barrel nuts for enhancing quick installation and removal. The unit is equipped with a long handle with contoured edges for ultimate comfort.

From our perspective, this unit is perfect for every DIY project with most levels of gunsmithing. Whether you need a wrench to do simple installments or gunsmithing purposes, this product is reliable and flexible enough to handle effectively.


  • Solid build-up model
  • High durability
  • Easy to use
  • Made of high-quality materials
  • Comfortable to hold


  • The flash hider, A2, and PWS Compensator that is too small to use

In general, if you want an armorers wrench that is only durable but also effective in tightening up nuts and bolts, this wrench is an ideal choice.

2. Multi Function Wrench Tools,Removal and Tighten

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Many buyers praise the flexibility of Multi Function Wrench Tools, Removal and Tighten armorers wrench. This unit is the best AR 15 armorer’s wrench in handling many DIY projects from installing accessories of muzzle brakes or Picatinny rail.

Primarily, this wrench kit contains all essential heads available for multiple sizes, which make the unit flexible and easy to use for different purposes. Users do not have to guess or pick randomly which wrench to use to handle the works. For the best AR 15 armorer’s wrench that saves most of your time, Multi Function Wrench Tools,Removal and Tighten armorer’s wrench is worth to invest.

Moreover, this wrench can fit with both encapsulated and barrel nuts. With a long handle, you would find no difficulty in holding and using it for a long time. The four teeth on the buttstock wrench help the activities of installing and dismantling extension nut super easy. 

Also, the wrench includes a half-inch square drive opening for torque tasks. Many positive reviews from customers are about the 5/8″ and 3/4″ slots, which perfectly fit A2 receiver extensions and flash hider.


  • High durability
  • Contains many choices of heads
  • The modern and handy design
  • Easy to use


  • The holding experiment is fair and average

This is an ideal all-in-one wrench if you intend for simple installation projects or gunsmithing purposes.

3. Spanner Nut Wrench for Removal or Installation of All Types of net

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The buyers love this wrench for many reasons. They said it is the best AR 15 armorer’s wrench when it comes to outstanding durability. The construction design is robust and durable. Even the experts comment that this device can be last for a very long amount of time.

The second reason is that the Spanner Nut Wrench comes in a perfect size. It not too big nor too small. The wrench is handy when you need speedy adjustments or upgrades for DIY projects. Also, the unit is suitable for multiple projects, such as household improvement or repair.

Not only DIY tasks, but the Spanner Nut Wrench product is also a heavy-duty and multi-functional task’s supporting tool. It is because the wrench is compatible with both stock and pin-style barrel nuts. Also, the device can engage in standardized flash hiders. 

You can install or remove many kinds of receiver extensions and castle nuts with this tool. Moreover, Spanner Nut Wrench‘s extended teeth with ASAP plates and two hammer faces offer excellent leverage without hurting your hands accidentally.


  • Excellent quality
  • Ergonomic design
  • Can handle both DIY and heavy-duty projects
  • Large handle for a comfortable experience
  • Lightweight


  • Slower than opened-ended buttstock wrench (due to enclosed end)

It is a wrench that is a solution for quick adjustments and installations. You can quickly bring this wrench to a construction site for a fast scopes’ switching.

4. AR-PRO 3-in-1 Wrench for Castle Nut, Plumbing, Pipe Fitting and Cars

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The Rock River Arms wrench stands out on the market due to its simple design. Most of the users satisfied with the ease of use. The unit is suitable for both novices and experts in most kinds of construction fields.

People often use this tool for removing buttstock-attached nuts and bolts and many kinds of accessories. People comment that it is a must-have tool for any gunsmith tasks, whether you are a beginner or being an expert for a long time.

What makes the Rock River Arms unit standing out is that the wrench comes with different wrench heads with distinguishing shapes for multi-purpose usage. The manufacturer provides a full package that includes a nut wrench, a muzzle wrench, a spanner wrench, a forearm wrench, a flat screwdriver, an A2 remover, and a can opener. If you need an all-in-one tool to remove complicated nuts or bolts, Rock River Arms wrench is the best AR 15 armorer’s wrench.

Also, the long handle offers plenty of leverage for removing/installing buttstocks or barrels effectively. The durability of the kit is extremely high since it is made from high-quality alloy steel with a powder-coat finish. It prevents oxidation and enhances the reliability of the product most effectively.


  • Simple and productive design
  • Suitable for any beginners
  • High performance
  • Useful package of supporting tools
  • Easy to use


  • Not ideal for professional heavy-duty tasks

This unit would be a must-have wrench for those who begin to learn about armorers wrench. The tool also comes with a full package of necessary supporting equipment to enhance productivity.

5. Arrington AR-15/M16 Armorer’s Wrench

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Many new users impress with things that Arrington armorers wrench brings to their works. They are fascinated with a tool that has a simple look that can quickly tighten and loosen the oddly-shaped parts with much torque. Tons of reviewers claim that their DIY projects, such as installing a buttstock onto a rifle, are implemented much more comfortably with this excellent tool.

The product kit comes with new heads that can fit the square-shaped parts so that users can loosen or tighten them quickly. Hence, the user can handle DIY projects and gunsmith tasks with no effort.

Notably, the tool is made from high-quality Parkerized steel, which is one of the most durable materials on the market so far. Also, this sturdy equipment is the best AR 15 armorer’s wrench for those who are starters in gunsmith works or whatever DIY projects such as upgrade or maintain the rifle. 

This solid looking unit is also designed to implement the heavy-duty tasks, e.g., removing or installing the proprietary barrel nut quickly. It thanks to the large, thick handle of 3/8″ with a square cutout. There is also a notch for removing the flash suppressor. 


  • High-quality material
  • Large handle for flexible usage
  • Can handle both simple and complex advanced projects
  • Compact design


  • Can only perform a single function

The Arrington AR-15/M16 armorer’s wrench is a fighter in installing and dismantling any accessory on AR-15. Its robust design and high durability are for those who require a longlasting unit through time.

What Things That The Best Ar 15 Armorer’s Wrench Should Have?

Most of the armorers wrench is made for a single and fundamental purpose. Then, the best AR 15 armorer’s wrench should give the user a variety of choices for multi-functions. Along with this thing, there are some criteria for an excellent armorer’s wrench.

Affordable Price

The cheap wrench can only handle a single purpose. However, a good wrench does not cost much of your budget. The suitable price on an excellent armorer’s wrench is from $50 to $70, depending on specific purposes.

Build Quality

The wrench’s quality is the most vital criterion that everyone must study before purchasing. The design of the best AR 15 armorer’s wrench should be perfectly aligned. The wrench must be able to take on all kinds of working pressure without being damaged easily.

Easy to Store

When not being used, the best AR 15 armorer’s wrench has to be easy to store at any location from the household basement to the construction site. The shape and design of the wrench would affect this issue. So, you should purchase a wrench that comes with a toolbox.

Safety First

Many manufacturers do not give much effort to upgrade the ergonomic design of their wrench. The preliminary design would lead to discomfort for holding experience, and even worse, injuries.

A bad design of a wrench can quickly leave marks or scuffs on the surface or powder-coating of the gun. Hence, this priority should pop-up in your head before deciding on the best AR 15 armorer’s wrench.


Which tasks does the Smith Enterprises AR-15/M-16 armorer’s wrench handle best?

The unit from Smith Enterprises is excellent to handle the simple installation of the accessory and purposes of a gunsmith. This wrench would give the users a long time of reliable and dedicated service, no matter the using frequencies.

What is the thickness of Brownells AR-15 armorer’s wrench at the slot for flash suppressors, and what are the dimensions of that slot?

The answer is approximately 400″ thick at both slots for flash suppressors, in which the small aperture is 0.658″ wide and 0.618″ deep, and the large slot 0.779″ wide and 0.689″ deep.

Does Magpul AR-15/M16 armorer’s wrench fit Aero Precision Barrel nuts?

If you are referring to the AR-15 M4E1 ENHANCED upper receiver proprietary barrel nut, the answer is no. The unit only works with a standard barrel nut.

Which Socket Bit shape and size are needed to attach to the Rock River Arms wrench?

This tool is not designed for use with a torque wrench.

Final Words

For the best AR 15 armorer’s wrench in the above list, the winner is Smith Enterprise AR-15/M16 wrench. This unit combines much of the basics with modern design to handle simple to complex tasks. It also comes with an affordable price for those who have a limited budget.

To choose the best AR 15 armorer’s wrench for your needs, keep in mind the criteria above when selecting at the local store or online shopping. Also, do check out our list of top picks for the best options.