Real Avid Master-Fit Thin Castle Nut Wrench - Titanium/Stainless Steel for AR-Platform

The Real Avid Master-Fit Thin Castle Nut Wrench is a purpose-built gunsmithing tool designed for installing and removing the castle nut on AR-platform rifles. The slim thin profile is built to reach the castle nut in tight spaces on AR-15 builds where standard, full-size wrenches are too bulky to fit, making it a focused solution for armorers and home builders working on the AR platform.

Machined from titanium and stainless steel, the Master-Fit wrench is built for strength and corrosion resistance during repeated use on the bench. The precise fit engages the castle-nut slots squarely for controlled torque application, reducing the slipping and rounding that can occur with improvised punches and makeshift tools.

Real Avid designs its tools around real-world armorer workflows, and this Master-Fit thin castle nut wrench is a compact, single-purpose addition to any AR-15 build or maintenance kit.