Dark Storm Industries DS-15 MOE .300 AAC Blackout 12.5in Upper Receiver w/MVG Grip No Handguard 1-7 Twist Anodized Black. Finally bolt action conversion kit is here. Live in a restricted state and want to convert your standard lower receiver into a bolt action? Here is your solution We sell it three ways. A full kit that includes 13" Typhoon handguard and 1 in 7 twist 5.56 barrel with no gas port drilled. The same kit minus the handguard so you can use one of your choosing. Lastly the bare bones kit where you supply the barrel bolt and handguard and we supply everything else. Specifications for Dark Storm Industries DS-15 Bolt Action 5.56x45mm NATO 16in Upper Kit: Manufacturer: Dark Storm Industries Caliber: 5.56x45mm NATO Barrel Length: 16 in Barrel Profile: Straight Barrel Twist Rate: 1-7 Finish: Anodized Color: Black Gun Model: AR-15 Fabric/Material: Aluminum Gas Block Journal Size-Diameter: .750 in Handguard Length: 13 in Gun Rail: M-LOK Gun Make: AR Platform Barrel Material: Steel Charging Handle Included: No Magazine Included: No Country of Origin: USA Features of Dark Storm Industries DS-15 Bolt Action 5.56x45mm NATO 16in Upper Kit Thin Profile for Improved Ergonomics Barrel Nut Included M-Lok Compatible Mounting System Investment Cast (not MIM) Two Stage Short Pull 3.5lb Flat Trigger Trigger Integrated Safety System Prevents Firing Out of Battery 8620 Bolt Carrier 9310 Bolt with Enhanced Profile for Extended Life Premium 4150 CMV Steel Certified to MIL-B-11595E Lightweight Straight Profile - NO Gas System Package Contents: Dark Storm Industries DS-15 Bolt Action 5.56x45mm NATO 16in Upper Kit What firearm models does the manufacturer say Dark Storm Industries DS-15 Bolt Action 5.56x45mm NATO 16in Upper Kit is compatible with? The manufacturer suggests that Dark Storm Industries DS-15 Bolt Action 5.56x45mm NATO 16in Upper Kit is compatible with AR-15Dark Storm Industries DSI-UK5-TBL-16T5-BLK-NHG: DS-15 MOE .300 AAC Blackout 12.5in Upper Receiver w/MVG Grip No Handguard 1-7 Twist Anodized Black