ATI Outdoors AR-15 Steel Muzzle Brake Jam Nut

The ATI Outdoors AR-15 Steel Muzzle Brake Jam Nut (brand part no. A.5.10.2255) is a small but essential hardware piece for anyone installing a muzzle brake or compensator on a .223/5.56 AR-15 barrel. This jam nut threads onto the barrel behind a muzzle device and locks against it once the brake is correctly indexed, keeping it from loosening or rotating out of position under recoil. ATI Outdoors machines this jam nut from steel for durability, giving builders a reliable way to secure a muzzle device without relying on thread locker alone. It’s a straightforward, inexpensive part that solves a real problem for anyone timing a muzzle brake to the correct clock position.

Key Specifications

• Sized for .223/5.56 AR-15 barrel threading.
• Constructed from steel for durability.
• Functions as a jam nut to lock a muzzle device in the correct index position.

Frequently Asked Questions

What is a jam nut used for? It threads onto the barrel behind a muzzle brake and locks against it to keep the brake from rotating out of its indexed position.

What caliber AR-15 does this fit? .223/5.56 AR-15 barrel threading.

Buy the ATI Outdoors AR-15 Steel Muzzle Brake Jam Nut

Keep your muzzle brake properly indexed and secure. Shop more ATI Outdoors parts in our rifle accessories selection. Order it from our Lubbock, Texas gun shop for fast, direct shipping.