LBE Unlimited Crush Washer — 17-4 Stainless Steel, Black — .308 / AR-10 (Model ARCW308, UPC: 765857617466)
Secure your muzzle device with confidence using the LBE Unlimited Crush Washer (ARCW308) — a precision-made, 17-4 stainless steel washer finished in black for corrosion resistance and a low-glare tactical appearance. Engineered specifically for .308 / AR-10 applications, this crush washer provides repeatable indexing, reliable sealing, and long-term durability for muzzle devices, compensators, and flash hiders that require a crush-type timing washer.
Precision Material & Construction
Unlike soft copper or stamped washers, the ARCW308 is manufactured from 17-4 precipitation-hardening stainless steel, offering an exceptional balance of strength, corrosion resistance, and dimensional stability. This material choice minimizes deformation beyond intended crush, resists thread galling, and maintains a clean surface under high-heat, high-round-count use — making it an excellent choice for duty rifles, precision AR-10 builds, and hardened field platforms.
Designed For .308 / AR-10 Applications
The ARCW308 is sized and specified to work with common .308/AR-10 thread patterns and muzzle devices that use a crush washer for timing and sealing. Whether you’re installing a new flash hider, brake, or muzzle compensator, this washer provides the predictable crush characteristics and secure index needed for consistent device orientation (e.g., ports up) and reliable gas dispersion.
Key Features & Benefits
Material: 17-4 PH Stainless Steel — high strength and corrosion resistance.
Finish: Black — low-reflective, tactical appearance that matches black anodized or Cerakote barrels and muzzle devices.
Purpose: Crush washer for proper indexing and sealing of .308 / AR-10 muzzle devices.
Durability: Withstands repeated installations and high-temperature environments better than softer alternatives.
Repeatable Indexing: Engineered to crush predictably for consistent muzzle device timing on re-install.
Anti-Galling: Stainless construction and precise OD/ID tolerances help minimize thread galling and ensure smooth install/removal.
Low Profile: Compact design does not add unnecessary length to the muzzle assembly.
Performance & Practical Advantages
Consistent Timing: Achieve correct orientation of multi-port brakes and flash hiders by relying on the ARCW308’s predictable crush behavior.
Improved Longevity: 17-4 stainless resists deformation and corrosion that can compromise thin, soft washers over time.
Tactical Finish: Matte black finish reduces glare and blends with tactical rifles for a professional, finished look.
Simplified Maintenance: Fewer failures and easier removal in the future compared to soft copper or aluminum washers.
Installation & Usage Notes
Confirm Fitment: Verify your barrel’s thread pitch and diameter are compatible with your muzzle device; ARCW308 is intended for common .308/AR-10 configurations—check device specifications before installation.
Positioning: Slide the crush washer over the muzzle threads with the concave face toward the muzzle device (per many manufacturers’ recommendations), though verify based on your muzzle device instructions.
Crush to Index: Thread the muzzle device until the washer begins to crush; continue tightening until the device indexes to the desired orientation (ports up, flats aligned, etc.).
Torque: Follow the muzzle device manufacturer’s torque recommendation where provided. Avoid excessive force that could damage threads or the barrel shoulder.
Removal: When removing the device, expect some permanent deformation of the washer; ARCW308 will perform better than soft washers across multiple cycles but may still be replaced if heavily crushed or distorted.
Replacement: For mission-critical rifles or after extensive use, inspect and replace the washer if deformation or loss of indexing ability is observed.
Compatibility Checklist
Platform: .308 / AR-10 style barrels and muzzle devices that accept a crush washer.
Devices: Flash hiders, muzzle brakes, compensators with crush-washer timing orientations.
Threading: Confirm your barrel / muzzle device thread spec before purchase. The washer is sized for common .308/AR-10 thread pitches—verify compatibility with your specific parts.
Maintenance & Care
Inspect the washer each time you remove the muzzle device for signs of fatigue, cracking, or extreme flattening.
Clean mating surfaces before reassembly to ensure proper seating and to avoid trapped debris that could affect timing.
Store spares in a dry environment to prevent surface oxidation despite the stainless finish.
Replace the washer when indexing becomes unreliable or after it shows severe permanent deformation.
Technical Specifications (At-A-Glance)
Model: ARCW308
UPC: 765857617466
Material: 17-4 Precipitation-Hardening Stainless Steel
Finish: Black (matte / low-glare)
Application: Crush washer for .308 / AR-10 muzzle device timing and sealing
Included: 1 × LBE Unlimited ARCW308 Crush Washer
Why Choose the LBE Unlimited ARCW308?
When orientation, sealing, and long-term reliability matter, the choice of crush washer is more than an afterthought. The LBE Unlimited ARCW308 brings a higher-grade material and precision manufacturing to a small but critical component, helping ensure your muzzle device times correctly, resists corrosion and deformation, and remains serviceable across multiple installations. Ideal for precision builds, duty rifles, and any shooter who prefers durable components where it counts.
Final Thoughts
Small parts make big differences. The LBE Unlimited 17-4 Stainless Steel Crush Washer (ARCW308) is a smart upgrade over softer washers — offering strength, reliability, and a tactical black finish for your .308/AR-10 muzzle assembly. Get predictable indexing, improved longevity, and better resistance to the elements — because when accuracy and timing matter, the right washer matters too.
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