Knight's Armament M4QD Flash Suppressor

This is a genuine part removed from a used airsoft gun purchased on an auction site.
Washers that are in relatively clean condition will be included.
The thread diameter is 1/2-28 inches.
It comes as a set with an unopened shim for the muzzle brake, as I had one.

The photos in the latter half are from when I measured the same muzzle brake.
The muzzle brake being measured is different from the one being sold.
These are reference photos.
Used shims are not included.

Based on my experience owning multiple genuine parts, I believe this to be genuine, but its authenticity is unconfirmed.

As I am the second owner (or later), the detailed acquisition history and usage history are unknown.

*The muzzle brake is currently in use.
The unopened shim is unused.
Photos of it in use will be attached later.
If you would like the latest individual photos, please contact me via comment.