A2 AR-15 5.56 Flash Hider with Crush Washer

Product Description

The A2 AR-15 5.56 Flash Hider with Crush Washer is a mil-spec pattern muzzle device designed to reduce visible muzzle flash when firing 5.56 NATO ammunition from AR-15 and M16 rifles. It uses the same prong design found on standard military carbines and rifles.

This flash hider threads onto the muzzle of your barrel and helps reduce the brightness of combustion gases as they exit the bore. The included crush washer allows proper timing and indexing during installation.

Builders and armorers use this device when assembling new uppers or replacing worn muzzle devices on existing rifles. It is a common choice for general-purpose builds and range rifles.

Key Facts

• SKU: WS-A2-AR15
• Caliber: 5.56 NATO
• Firearm Type: AR-15/M16
• Includes: Crush washer for timing

How the A2 Flash Hider Works

Flash hiders interrupt the expanding combustion gases as they leave the muzzle. The A2 design uses a closed bottom and multiple vertical slots. This pattern directs gases upward and to the sides, breaking up the fireball that can impair vision in low light.

The A2 does not eliminate all flash. It significantly reduces the bright signature compared to a bare muzzle or basic thread protector. It does not reduce recoil or rearward thrust the way a compensator or muzzle brake does.

Installing an A2 Flash Hider with a Crush Washer

A crush washer is a soft metal ring that sits between the barrel shoulder and the flash hider. As you torque the device onto the barrel, the washer compresses. This allows you to time the flash hider correctly so the closed bottom faces down.

Installation requires a torque wrench and an armorer’s wrench with the correct notches for the A2 flash hider. Over-torquing can damage the barrel threads. Under-torquing may allow the device to loosen under recoil. If you are not equipped for proper installation, send us a message to discuss gunsmithing services.

A2 Flash Hider vs. Muzzle Brake

An A2 flash hider reduces visible signature. A muzzle brake redirects gases to counteract recoil and muzzle rise. Brakes are louder and create sharper concussion for the shooter and anyone nearby.

If your priority is controlling muzzle flip during rapid fire, a compensator or brake is the better choice. If you want a quieter shooting experience with less blast and a moderate reduction in flash, the A2 is a proven option. Browse our full selection of muzzle devices for other configurations.

Ordering from Western Sport

Order online and it ships straight to your door. Western Sport has been a licensed FFL/SOT dealer since 2007, and everything we sell carries the full manufacturer warranty. Questions before you order? Send us a message.

Frequently Asked Questions

Q: Will the A2 flash hider fit my 5.56 barrel?

A: The A2 AR-15 5.56 Flash Hider is designed for AR-15 and M16 rifles chambered in 5.56 NATO. Send us a message to confirm thread pitch and compatibility with your specific barrel before ordering.

Q: Does the A2 flash hider reduce recoil?

A: The A2 flash hider does not significantly reduce recoil. Its primary function is to reduce visible muzzle flash by redirecting combustion gases. For recoil reduction, consider a muzzle brake or compensator instead.

Q: Do I need a crush washer to install an A2 flash hider?

A: A crush washer is included and allows you to properly time the flash hider so the closed bottom faces down. Some builders prefer peel washers or shims for more precise timing. Send us a message if you have installation questions.

Q: Can I install the A2 flash hider myself?

A: You can install the A2 flash hider if you have an armorer’s wrench and a torque wrench. Proper torque and alignment are critical to avoid damaging the barrel threads. Western Sport offers gunsmithing servicesif you prefer professional installation.

Q: What is the difference between an A2 and a birdcage flash hider?

A: The term “birdcage” is often used to describe the A2 flash hider because of its slotted appearance. They generally refer to the same mil-spec prong design with a closed bottom and vertical slots.

Additional information