Do I need a castle nut wrench for my AR-15?

Yes, a castle nut wrench is essential for tightening or removing the castle nut on your AR-15's buffer tube assembly. It's a must-have tool for proper lower receiver installation.

What is the difference between a castle nut wrench and an armorer’s wrench?

A castle nut wrench is a single-purpose tool used specifically for the castle nut, while an armorer’s wrench combines multiple tools in one to handle various AR-15 components like barrel nuts and muzzle devices.

Can I install an AR-15 barrel nut without a torque wrench?

It’s not recommended. A torque wrench ensures proper installation torque, preventing over- or under-tightening that could affect function or damage parts.

Are these tools compatible with all AR-15 rifles?

Yes, our AR wrenches are compatible with most Mil-Spec AR-15, M4, and M16 platforms. Always verify your part specs before purchase.

AR-15 Wrenches – Armorer’s Tools for Castle Nut, Barrel Nut & Builds |

Name: AR-15 Armorer’s Wrenches & Castle Nut Tools
Brand: Mounts Plus
Availability: InStock

**Aim Sports AR Stock Wrench Tool / Castle Nut Wrench & 1911 Bushing Tool** $3.95

**Magpul Armorer's Wrench AR15/M4** $75.95

**NcStar AR15 Armorers Wrench - Gen 2** $30.99

**Vism AR15 Wrench Gen 3 - Pro Series AR15 Barrel Wrench** $30.99

**Vism Pro Series AR Lower Receiver Wrench** $30.99

**NcStar AR15/M4 Gunsmithing Tool Kit - Black** $51.99

**Wheeler Basic Armorer's Wrench** $34.95

**Wheeler Professional Armorer's Wrench** $54.95

**Real Avid Armorer's Master Wrench** $89.99

**DPM Compact Castle Nut Wrench For AR-15 & M-16** $17.73

**Brigand Arms BAAR Tool | Armorer’s Wrench** $35.10

**UTG Armorer's Wrench for AR15/AR308** $44.97

**Truglo AR-15 Armorer's Wrench** $38.99

**Truglo AR-15 Armorer's Tool Multi-tool** $33.25

AR-15 Wrenches – Castle Nut & Armorer’s Tools for Rifle Builds

When it comes to maintaining, building, or upgrading your AR-15, the right tools make all the difference. At Mounts Plus, we offer a curated selection of high-quality AR-15 wrenches designed for both professional armorers and DIY gun builders. Whether you're tightening a castle nut, installing a barrel, or completing your first rifle build, you’ll find the exact AR-15 wrench tool for the job.

From multi-function armorer’s wrenches to compact castle nut tools, our AR wrench collection ensures precision, durability, and ease of use.

🔩 Shop Top AR-15 Wrench Tools

Product Name	Functions	Best For
NcSTAR Armorer’s Wrench Gen 2 / Gen 3	Barrel nut, stock, flash hider	All-around builds & maintenance
Aim Sports AR Wrench Combo Tool	Castle nut + 1911 bushing	Lightweight, dual-use
Vism Pro Series AR Lower Receiver Wrench	Receiver nut & lower work	Builders focused on lower installs
DPM Compact Castle Nut Wrench for AR-15 & M16	Castle nut only	Minimalist tool kit
NcStar Gunsmithing Tool Kit	Multi-tool kit	Bench setup for full builds

✅ Compatible with Mil-Spec AR-15, M4, and M16 parts
✅ Works with castle nuts, barrel nuts, buffer tubes, flash hiders & more
✅ Ideal for torquing, removal, and installation tasks
✅ Hardened steel construction for long-lasting durability

🔧 Types of AR-15 Wrenches We Offer

🔹 Castle Nut Wrenches

Essential for installing or removing your buffer tube assembly and tightening the castle nut on your lower receiver.

🔹 Armorer’s Wrenches

Multi-function tools designed to work on barrel nuts, flash hiders, castle nuts, and stock tubes. Ideal for complete builds.

🔹 Lower Receiver Wrenches

Specialized for trigger guard pins, buffer retainers, and receiver extensions. Helpful for lower receiver assembly and repair.

🔹 Combo Wrenches & Tool Kits

Perfect for home builders or professionals looking for versatile, space-saving tools or complete tool kits.

🎯 Who Needs an AR Wrench?

🧰 AR-15 Builders – A must-have tool for barrel nut, stock, and muzzle device installation
🛡️ Armorers & Gunsmiths – Full-featured wrench tools for disassembly and upgrades
🎯 Competitive Shooters – Lightweight tools for on-the-go adjustments or emergency fixes
🔧 DIY Enthusiasts – Affordable castle nut tools and multi-use kits for garage builds

🛠 How to Choose the Right AR-15 Wrench

Need	Recommended Tool
Barrel nut or full build	NcSTAR or Pro Series Armorer’s Wrench
Budget castle nut install	DPM Castle Nut Wrench
Receiver tube & castle work	Vism Lower Receiver Wrench
Versatile on-the-go tool	Aim Sports Combo Wrench
All-in-one bench tools	NcStar Gunsmithing Tool Kit

❓ Frequently Asked Questions

Q: What is an AR-15 armorer’s wrench used for?
A: It’s a multi-use tool that lets you install or remove parts like the barrel nut, buffer tube, flash hider, and castle nut. It's a staple for AR builders.

Q: Can I install a buffer tube with a basic wrench?
A: You’ll need at least a castle nut wrench to tighten the buffer tube properly. We recommend a torque wrench for proper spec torque.

Q: Is a specialized AR wrench necessary for builds?
A: Yes. AR parts require specific wrench types to avoid damaging components and ensure secure installation.

Q: What’s the difference between a castle nut wrench and armorer’s wrench?
A: A castle nut wrench is single-purpose. An armorer’s wrench handles multiple tasks and is more versatile for full builds.

Q: Do I need a torque wrench too?
A: For torque-sensitive components like barrel nuts, yes. Use a torque wrench in conjunction with your AR wrench for accuracy and safety.

🔗 Related Tools & Build Essentials

🛒 Why Buy AR Wrenches from Mounts Plus?

✔️ Trusted brands like NcStar, Aim Sports, and Vism
✔️ Tools for every AR-15 platform and gunsmithing level
✔️ Veteran-owned business with 30+ years of firearm support
✔️ Fast shipping and real customer service
✔️ Satisfaction guaranteed on all tools

🔥 Build Better. Maintain Smarter. Torque With Confidence.

Whether you're doing a quick buffer tube install or a full rifle build, our AR-15 wrenches give you the precision, strength, and ease you need to get it done right.

➡️ Shop AR-15 Wrenches at Mounts Plus Today
➡️ Castle Nut | Barrel Nut | Flash Hider | All-In-One Tools