Crush washer for 5.56 AR-15 / M16 / M4 / AR-9's with 1/2 x 28 thread or 1/2 x 36 Thread.
- 1/2 Inch
- Black Oxide coating*
- Mil-Spec Dimensions
- Made in USA
- Made with US Steel
The black oxide coating is produced by a chemical reaction between the iron on the surface of the ferrous metal and the oxidizing salts present in the black oxide solution. These oxidizing salts include penetrates, catalysts, activators and proprietary additives which all take part in the chemical reaction that bond with the metal.
Manufacturing Quality First
