SPEED Adjustable Nut Wrench

SPEED Airsoft Adjustable Nut WrenchThe Canadian company SPEED Airsoft have specialized in various innovative tools (Pro tools) and parts for airsoft weapons. We have tested the tools SPEED Delta Ring Wrench (#SA2068), SPEED M4/M16 Tool (#SA2096) and SPEED Adjustable Nut Wrench (#SA2078). The tools are designed for M4/M16 weapons.

Read the original in Swedish Läs SPEED Adjustable Nut Wrench recension på svenska (the original review)

Contents of the package

The tool comes in a plastic box. On the back there is information about the tool and what it used to.

The tool comes in a plastic box. On the back there is information about the tool and what it used to.

Appearance and Build Quality

SPEED Adjustable Nut Wrench from the front. SPEED Adjustable Nut Wrench from behind.

This tool is for loosen or tighten the buffer tube / castle nut who is around the stock on the receiver of the weapon and other similar nuts (Madbull barrel nut and others). To get the tool to fit all possible nut sizes it’s possible to change the diameter width, between 30 and 45 mm (1.18 to 1.77 inches).

You can either have the movable part loose so the width can be adjusted by simply dragging, or you can lock the movable part (it was from the factory) but they you need an Hex key/Allen Key 2 mm.

The tool consists of three pieces aluminum parts which is CNC machined and then assembled with screws.

Close up from the front. Close up from the behind.

Close ups on the tool. On the right picture you see two hardened drive pins and they hooks in holes in nuts and the plate below them making it more stability when loosen or tighten the nut.

Field test / In action

SPEED Adjustable Nut Wrench with Allen key (not included). Buffer tube nut. SPEED Adjustable Nut Wrench in action.

The airsoft weapons we have tested the tool with are King Arms M4A1 (KA-AG-20), Dboys M4A1 and Tokyo Marui M733 (but not applicable on this).

The tool’s two hardened drive pins hooks the nuts good when the width is adjusted.


The SPEED Adjustable Nut Wrench looks good, feels solid and it’s easy to work with. It’s also good that the tool is allowed to fit nuts with different widths.

Many of us have already Allen keys at home (or in the Airsoft workshop…) but we think that an Allen key should be included for this tool.

Finally, we like the tool and recommended it to you to have in your toolbox if you need to repair or upgrade your gun. Maybe you feel that the price is too high for a simple tool (about $ 40 from retailers), but it’s a tool with good quality.


We have not compared this tool with other similar tools on the market, also our opinions based entirely on this product.



SPEED Airsoft’s products sells by several retailers around the world. Check this website to see your nearest retailer: http://www.speedairsoft.com/WhereToBuy.php

The Swedish airsoft retailer Vapenbutiken is one of two retailers in Europe for the moment.

This review is made by Daniel (Coordinator Product testing) and the manufacturer SPEED Airsoft in Canada has provided us with this product.