We are working very hard at replenishing all our inventory. In the meantime some items are taking longer than normal. Thank you for your understanding!
The Crush Washer installs with the convex side (bulges outward) towards the receiver, and the concave side (curves inward) contacting the Flash Hider. It allows proper timing/alignment of the ports on the Flash Hider, and should be replaced every time the flash hider is removed.
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