JL Billet Barrel Nut .308 7075-T6 DPMS Profile Black. 1 7/6 x 16 thread pattern for DPMS platform upper receivers and machined to 1.54" OD for JL Billet Handguard sytems. Specifications for JL Billet Barrel Nut .308 7075-T6 DPMS Profile: Manufacturer: JL Billet Color: Black Condition: New Fabric/Material: 7075-T6 Aluminum Finish: Hard Black Anodized Weight: 0.1 lb Projectile Caliber: .308 Caliber Country of Origin: USA Gun Make: DPMS Caliber: .308 Winchester Package Contents: JL Billet Barrel Nut .308 7075-T6 DPMS Profile JL Billet JLB-308-BN: Barrel Nut .308 7075-T6 DPMS Profile Black