Dark Storm Industries DS-15 Typhoon AR-15 .300 Blackout 16in Complete Upper Receiver Pistol Length 1-8 Twist 5/8x24 Cerakote Olive Drab Green. Featuring a SOCOM barrel and patented Firestorm compensator this upper is ready to handle demanding use while maintaining exceptional accuracy and durability. Specifications for Dark Storm Industries DS-15 Typhoon AR-15 .300 Blackout 16in Complete Upper Receiver: Manufacturer: Dark Storm Industries Caliber: .300 AAC Blackout Barrel Length: 16 in Barrel Profile: SOCOM Gas System Length: Pistol Length Barrel Twist Rate: 1-8 Firearms Threads Per Inch: 5/8x24 Handguard Type: Free-Float Muzzle Device: Firestorm Compensator Finish: Cerakote Fabric/Material: 4150 CMV Steel 7075-T6 Aluminum Handguard Length: 13 in Gun Make: AR Platform Gun Model: AR-15 Barrel Material: Steel Bolt Carrier Group Included: MIL-SPEC Country of Origin: USA Features of Dark Storm Industries DS-15 Typhoon AR-15 .300 Blackout 16in Complete Upper Receiver Mil-Spec pinned forward assist Threaded forward assist screw Mil-Spec dry film lubricated bore DSI Atach ambi charging handle Mil-Spec investment cast bolt catch Premium investment cast single stage trigger (4.5lb pull) 8620 bolt carrier (diamond honed bore) 9310 bolt (enhanced profile) 4130 gas key (Grade 8+ Torx staked) 8740 steel ground chrome firing pin Springco XP 5 coil extractor spring DSI 16 SOCOM Profile Barrel Button rifled Pistol length Gas System Package Contents: Dark Storm Industries DS-15 Typhoon AR-15 .300 Blackout 16in Complete Upper Receiver What firearm models does the manufacturer say Dark Storm Industries DS-15 Typhoon AR-15 .300 Blackout 16in Complete Upper Receiver is compatible with? The manufacturer suggests that Dark Storm Industries DS-15 Typhoon AR-15 .300 Blackout 16in Complete Upper Receiver is compatible with AR-15Dark Storm Industries DSI-UC5-TYP-6P8-T3-FDE: DS-15 Typhoon AR-15 .300 Blackout 16in Complete Upper Receiver Pistol Length 1-8 Twist 5/8x24 Cerakote Olive Drab Green