Guntec USA AR .308 Ultimate Rifle Kit Anodized Red. 308 Ultimate Rifle Kit Includes: AR .308 Cal Ultralight Series Complete Furniture Set (Includes 15? Handguard Grip Stock and Mil-Spec Buffer Tube Set); AR .308 Micro Slip Over Barrel Shroud With Multi Port Muzzle Brake; AR .308 Charging Handle With Gen 5 Latch; AR .308 Ejection Port Dust Cover Assembly (Gen 3) (Recommended For Billet Uppers Only); AR-15 Anti-Rotation Trigger/Hammer Pin Set; AR .308 Cal Extended Takedown Pin Set (Gen 2); M-LOK Micro Angle Grip; AR-15 Multi Degree Short Throw Ambi Safety; Forward Assist Assembly; AR15 Extended Mag Button; AR15 Mag Catch Lever Specifications for Guntec USA AR .308 Ultimate Rifle Kit: Manufacturer: Guntec USA Finish: Anodized Fabric/Material: T6 Aluminum Gun Make: AR Platform Gun Model: AR-15 Handguard Length: 15 in Threads per Inch: 5/8x24 Caliber: .308 Winchester Package Contents: Guntec USA AR .308 Ultimate Rifle Kit Proprietary Barrel Nut What firearm models does the manufacturer say Guntec USA AR .308 Ultimate Rifle Kit is compatible with? The manufacturer suggests that Guntec USA AR .308 Ultimate Rifle Kit is compatible with AR-15Guntec USA ULT-RK-308-RED: AR .308 Ultimate Rifle Kit Anodized Red