Advanced Technology Intl AR-15 223/5.56 Stainless Steel Crush Washer Pack - 5pcs

The Advanced Technology Intl AR-15 223/5.56 Stainless Steel Crush Washer Pack is a set of five precision crush washers engineered for AR platform rifles chambered in .223 and 5.56 NATO. If you're assembling an upper receiver, installing a muzzle brake, flash hider, or suppressor, crush washers are essential—they compress under bolt torque to align your muzzle device perfectly, ensuring consistent point of aim and helping maintain zero across shooting sessions. These high-polish stainless steel washers are built to last through barrel changes and upgrades without degrading or requiring replacement.

Crush washers work by filling the gap between your barrel's muzzle threads and the muzzle device mounting surface. As you torque the device in place, the washer compresses to take up any tolerance stack-up, keeping everything square and centered. Stainless construction resists corrosion and won't leave rust marks on your handguard or brake. This five-piece pack gives you spares for future builds, test fits, or just keeping one in your range bag.

Whether you're building a new upper, swapping brakes during load testing, or maintaining a rifle in the field, having quality crush washers on hand eliminates guesswork and reduces the risk of canting your muzzle device. ATI makes these from premium materials, so you're getting durability and consistent performance every time.

Key Features

• Five stainless steel crush washers per pack—enough for multiple builds or spares
• High-polish finish resists corrosion and looks clean on any rifle
• Designed for 1/2"-28 threaded AR-15 barrels (standard .223/5.56 pitch)
• Compresses under torque to ensure proper muzzle device alignment
• Essential for precision and consistency with brakes, flash hiders, and suppressors

Specifications

Thread Size	1/2"-28
Material	Stainless Steel
Finish	High Polish
Quantity	5 Washers
Caliber Compatibility	.223 Remington / 5.56 NATO
Platform	AR-15

Frequently Asked Questions

What are crush washers used for on an AR-15?

Crush washers compress under torque to fill the gap between your barrel threads and muzzle device (brake, flash hider, suppressor), aligning the device perpendicular to the bore. This ensures consistent point of aim and helps maintain zero when you swap or service the device.

Will these fit my muzzle brake or flash hider?

These washers are designed for 1/2"-28 threaded barrels, which is the standard thread pitch for AR-15s in .223 Remington and 5.56 NATO. Most aftermarket brakes, hiders, and suppressors use this pitch, but verify your specific device before purchase.

Why stainless steel?

Stainless steel resists rust and corrosion, won't discolor your handguard, and maintains its finish through repeated assembly and disassembly. The high-polish surface keeps your rifle looking sharp without requiring extra maintenance.

How many do I need?

You need one crush washer per muzzle device installation. This pack of five gives you enough for multiple builds, future upgrades, or spares to keep on hand.