The Tiger Rock Inc. FBN AR-15 Barrel Nut with Steel Jam Nut Ring revolutionizes firearm customization and reliability. This durable kit is expertly designed for free float quad rail handguards, fitting standard AR-15 upper receivers with ease. Crafted from lightweight 6061 aluminum, the matte black barrel nut enhances both aesthetics and performance. Meanwhile, the hardened steel jam nut ring guarantees a secure attachment, facilitating optimal shooting stability. Free Float Barrel Nut - 6061 Aluminum Locking Jam Nut Ring - Hardened Steel Set Screw Nut for secure installation Comes with Allen Wrench for quick setup Upgrade your AR-15 build with this essential barrel nut kit for improved shooting precision.