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MadBull Barrel Nut Washer Rail System Shim Set

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MadBull Barrel Nut Washer Rail System Shim

Quick Overview

Barrel Washer for installing rails or RAS on any AEG or GBBR


Out of stock



The MadBull Barrel Nut Washer set is designed to allow for precise installation of any rail system on AR type airsoft rifles. This allows for all rail systems and barrels to be installed without any play and to align perfectly with the receiver.

The Barrel Nut Washer is a product that has been needed by airsoft users for years, and it's finally available from MadBull Airsoft. When mixing parts brands, occasionally some parts will run into compatibility issues. The MadBull barrel nut washer insures that, no matter what brand airsoft rifle or barrel you have, your MadBull rail system will install perfectly. In addition, some older rail system designs must be tightened perfectly, or the rail won't line up with the receiver. The washer set includes multiple thickness shims, which will allow for a perfectly aligned rail system.

MadBull states that the main function is to eliminate gap between rail and upper receiver. These washers will ensure a contour fit between barrel nut and upper receiver, eliminating misalignment and RIS instability. The MB Barrel Nut Washers come in 4 sizes to fit many different configurations.

Package include:
- 0.1mm X1
- 0.15mm X1
- 1.5mm X1
- 2mm X1

- Eliminate gap between rail and upper receiver
- Precisely aligns fastening screws on RIS systems
- Ensures stability
- Prevents RIS from angling during installation

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