The brake is used, but still in really good shape. There's some slight discoloration from use, but other than that, everything looks good.
Installation and removal were done cleanly and there is no deformation to the flats.
This brake came as part of a rifle I purchased, so I do not have the original packaging. There are 4 shims included.
These are hard to find at the moment and one recently sold on the EE for $320 - link
KAC 5.56 MAMS Muzzle Brake - $275 SPF to Bugsy5150
Payment via USPS money order, Google Wallet, or Venmo. No paypal!
In case of competing offers to buy, I will go by the earliest "I'll take it" posted here.
(The knife in the pics is not included in the sale.)