Real Avid Mstr Ext Castle Nutwrench
$29.23
The Real Avid Master-Fit Extended Castle Nut Wrench is a must-have for any serious firearms builder, offering precise fit and expert craftsmanship for both extended and standard castle nuts. Designed for versatility, it also accommodates various barrel nuts and buffer tubes, ensuring you have the right tool for assembly and maintenance tasks. Elevate your gun-building experience with this essential addition to your toolkit.
14 in stock
Real Avid Master-Fit Wrench, Wrench, Stainless Steel, Extended & Standard Castle Nut AVMFESCNW
| Weight | 0.438 lbs |
|---|---|
| Dimensions | 6.750 × 4.750 × 1.000 in |
| Manufacturer | Real Avid |
PROCESSING & SHIPPING
Orders typically ship within 1–3 business days (Monday–Friday) after payment and all required documentation are received. Time to arrival after shipment depends on the carrier. Shipping method is at BT Gun Company’s discretion; ammunition and oversized accessories are charged at actual shipping cost. We do not ship to Hawaii or Alaska.
FIREARM TRANSFERS
- Firearms must ship to a licensed FFL dealer of your choosing — confirm with them first that they can accept the transfer.
- Your receiving FFL will need to email their license to [email protected] before we can ship.
- Inspect your firearm at your FFL’s location before signing ATF Form 4473 — once signed, the firearm is considered accepted.
You’re responsible for knowing the firearms laws in your state before ordering. For complete shipping, returns, and restocking-fee policy details, see our Shipping & Returns page.

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