AR-15 5.56mm Crush Washer — For 1/2x28 Muzzle Devices | Model BL-06-CW | UPC 859819007690
Time your muzzle device the right way—fast, secure, and repeatable. The AR-15 5.56mm Crush Washer (BL-06-CW) is a single-use, precision-formed washer that lets you properly index and secure 1/2x28-threaded muzzle brakes, compensators, and flash hiders on 5.56/.223 barrels. Built from hardened steel with a durable black finish, this crush washer compresses predictably as you torque, delivering a tight, square lockup against the barrel shoulder for consistent accuracy and long-term reliability.
Why This Crush Washer
Correct timing in minutes: Easily align ports or tines to the 12 o’clock position—no trial-and-error stacking of random spacers.
Clean, square lockup: Uniform cone geometry helps seat the device true to the bore and tight to the shoulder, supporting accuracy and repeatable POI.
Hardened single-use design: Engineered to deform once under torque for a secure hold that won’t back off under heat and recoil.
Mil-standard compatibility: Sized for 1/2x28 muzzle threads used on AR-15 5.56/.223 barrels and most 5.56-caliber muzzle devices.
Low-glare protection: Black oxide (or comparable) finish resists corrosion and blends with parked, nitrided, and anodized builds.
Perfect For
Muzzle brakes & comps that require precise top-dead-center indexing
Flash hiders (A2, 3-prong, birdcage styles) on 5.56/.223 barrels
Duty, defense, and training carbines needing reliable, maintenance-friendly assembly
Quick Install Guide (Best Practices)
Verify fit: Confirm a 1/2x28 threaded muzzle and 5.56/.223 device.
Orient the washer: Place the flat side toward the barrel shoulder and the beveled/convex side toward the muzzle device.
Hand start: Thread the device on by hand with the crush washer in place until it seats lightly.
Torque & time: Using an armorer’s wrench, torque to the device manufacturer’s spec (commonly 15–20 ft-lb) while rotating to final index at 12 o’clock.
Do not reuse: If removed, replace with a new crush washer before reinstallation.
Pro Tip: Running a suppressor or precision suppressor mount? Use precision shims or a shoulder-squaring device per the mount manufacturer—do not use a crush washer on suppressor-ready systems unless explicitly specified.
Compatibility Notes
Threads: 1/2x28 TPI (standard for AR-15 5.56/.223).
Caliber: .223 Rem / 5.56 NATO (and other .22-cal AR-15 variants using 1/2x28).
Not for: 7.62/.30-cal devices (typically 5/8x24), direct suppressor mounting, or re-use after removal.
What Sets It Apart
Consistent crush range supports predictable timing without over-torque.
Bore-safe geometry helps keep devices square, reducing the chance of uneven gas escape that can induce POI shift.
Armorers’ staple: A simple, proven solution for most 5.56 muzzle devices.
Specifications
| Attribute | Detail |
|---|
| Product | AR-15 5.56mm Crush Washer |
| Model / SKU | BL-06-CW |
| Thread Compatibility | 1/2x28 TPI (5.56/.223) |
| Material | Hardened steel |
| Finish | Black (low-glare, corrosion resistant) |
| Use | Single-use (replace after removal) |
| Orientation | Flat side to barrel shoulder; beveled side to device |
| UPC | 859819007690 |
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Time it right and lock it down—choose the AR-15 5.56mm Crush Washer (BL-06-CW) for fast, secure, and square installation of your 1/2x28 muzzle device.
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