Dark Storm Industries DS-15 AR-15 Typhoon .300 AAC Blackout 7.5inch Upper Receiver Pistol Length 1-8 Twist 5/8x24 Firestorm Compensator Cerakote Olive. Featuring a SOCOM barrel and the Firestorm compensator this upper is ready to handle demanding use while maintaining exceptional accuracy and durability. Specifications for Dark Storm Industries DS-15 AR-15 Typhoon .300 AAC Blackout 7.5inch Upper Receiver: Manufacturer: Dark Storm Industries Caliber: .300 AAC Blackout Barrel Length: 7.5 in Barrel Profile: SOCOM Gas System Length: Pistol Length Barrel Twist Rate: 1-8 Threads per Inch: 5/8x24 Muzzle Device: Firestorm Compensator Finish: Cerakote Fabric/Material: 4150 CMV Steel 7075-T6 Aluminum Handguard Length: 6 in Gun Rail: Picatinny Gun Type: Pistol Gun Make: AR Platform Gun Model: AR-15 Barrel Material: Steel Bolt Carrier Group Included: MIL-SPEC Charging Handle Included: MIL-SPEC Features of Dark Storm Industries DS-15 AR-15 Typhoon .300 AAC Blackout 7.5inch Upper Receiver Lifetime warranty Fully Transferable No Registration or Proof of Purchase Required Package Contents: Dark Storm Industries DS-15 AR-15 Typhoon .300 AAC Blackout 7.5inch Upper Receiver What firearm models does the manufacturer say Dark Storm Industries DS-15 AR-15 Typhoon .300 AAC Blackout 7.5inch Upper Receiver is compatible with? The manufacturer suggests that Dark Storm Industries DS-15 AR-15 Typhoon .300 AAC Blackout 7.5inch Upper Receiver is compatible with AR-15Dark Storm Industries DSI-UC5-TYP-7P8-T3-ODG: DS-15 AR-15 Typhoon .300 AAC Blackout 7.5inch Upper Receiver Pistol Length 1-8 Twist 5/8x24 Firestorm Compensator Cerakote Olive Drab Green