The Magpul Armorer’s Wrench (brand part no. MAG535-BLK) is a multi-function combination wrench built to cover the most common torque jobs on an AR-15 or M4 build in a single tool instead of a drawer full of single-purpose wrenches. It is designed to handle the barrel nut, the castle nut and buffer tube assembly, and the A2 flash hider all with the same wrench, which is the trio of fasteners most home armorers need to touch during a build or repair. Keeping one wrench on the bench instead of three reduces both clutter and the odds of reaching for the wrong tool mid-job.

Key Specifications

• Multi-Function Combination Design Combines barrel nut, castle nut, and A2 flash hider functions in one wrench.
• Fits AR-15/M4 Barrel Nuts Sized to torque standard AR-15/M4 barrel nuts.
• Fits Castle Nuts Also fits the castle nut used on standard AR-15/M4 buffer tube assemblies.
• Fits A2 Flash Hiders Also fits standard A2-style flash hiders for install and removal.

Frequently Asked Questions

What fasteners does this wrench cover? It is built to handle the barrel nut, the castle nut and buffer tube assembly, and the A2 flash hider.

Why use one combination wrench instead of separate tools? Covering barrel nut, castle nut, and flash hider work with one wrench keeps the bench simpler and reduces the chance of reaching for the wrong tool.

Buy the Magpul Armorer’s Wrench for AR-15/M4, Black

Order the Magpul Armorer’s Wrench from our Lubbock, Texas gun shop for fast, direct shipping to your next build. See the rest of our gunsmithing tools and gunsmith supplies.