The J P Enterprises AR-15 .750 Jam Nut 1/2-28" Steel Black is a precision-machined hex jam nut designed to securely index muzzle brakes, flash hiders, and other muzzle devices on AR-15 barrels with 1/2-28 threads. Built from durable steel with a black oxide finish, it offers a low-profile solution that replaces single-use crush washers while maintaining consistent alignment of your muzzle device.

This jam nut is ideal for shooters who frequently change or fine-tune their muzzle devices for range work, competition, or training. Its reusable design allows you to time your brake or compensator without shims, and the thin-wrench flats make installation straightforward while keeping the profile compact around low-profile gas blocks and handguards. It is a practical upgrade for AR-15 owners who value clean builds and repeatable alignment backed by J P Enterprises’ reputation for precision machining and thoughtful engineering.

Key Features:

• Manufacturer: J P Enterprises
• Model: AR-15 .750 Jam Nut 1/2-28" Steel Black
• Material: Steel
• Color: Black
• Barrel Diameter Compatibility: 0.750"
• Thread: 1/2-28
• Thickness: 0.200"
• Design: Hex jam nut for indexing muzzle devices