Tiger Rock AR-10 .308 Steel 5/8x24 Threaded Stainless Muzzle Brake Jam Nut Stainless. This steel jam nut is 5/8in X 24 threaded just like a standard AR-10 muzzle brake so it can be installed and removed easily unlike many other muzzle brake threaded muzzle devices. The design of the Tiger Rock Jag Nut ensure that the brake is always perfectly aligned giving you a great deal of accuracy. It is so effective that a powerful muzzle brake can actually make you shoot faster Compatible with most muzzle brake accessories the Tiger Rock Muzzle Brake Jam Nut can really be the difference maker Package Contents: Tiger Rock AR-10 .308 Steel 5/8inx24 Threaded Muzzle Brake Jam Nut Tiger Rock JN3-S: AR-10 .308 Steel 5/8x24 Threaded Stainless Muzzle Brake Jam Nut Stainless