Dark Storm Industries DS-15 MIL-Plus AR-15 5.56 NATO Bolt Carrier Group Nickel Boron Black

Dark Storm Industries DS-15 AR-15 5.56 Nato Nickel Boron Bolt Carrier Group Black. We do not do "batch" inspections where only a few parts are checked. This process takes more time and results in more scrap but the result is every part is in spec. The bolt features enhanced geometry changes with an increased radius on the rear of the lugs which reduces the stress concentrations at the most common point of failure. The bolt also features an increased body diameter around the cam pin to reduce bolt stretch at the second most common failure point. Together these changes provide as much as a 50percent increase in bolt life while remaining compatible with standard Mil-Spec bolt carriers and barrel extensions. All parts are properly heat treated and finished per the Mil-Spec. Don't be fooled by cheap nitride finished bolt carriers. The Mil-Spec prohibits the use of nitriding (Note 9.B.4) for a reason. All components are finished with Nickle Boron for corrosion resistance and hexavalent hard chrome for heat and wear resistance in critical areas. We do not high pressure test commercial bolts as doing so reduces the operational life span. Bolts and bolt carriers are marked with lot numbers to provide full traceability of material machining heat treatment and finish. Specifications for Dark Storm Industries DS-15 AR-15 5.56x45mm Nato MIL-Plus Bolt Carrier Group: Manufacturer: Dark Storm Industries Fabric/Material: Steel Carrier Material: 8620 Steel Caliber: 5.56x45mm NATO Gun Make: AR Platform Gun Model: AR-15 Hand: Right Features of Dark Storm Industries DS-15 AR-15 5.56x45mm Nato MIL-Plus Bolt Carrier Group Mil-Plus Enhanced Geometry with Mil-Spec Compatibility Heat Treated per Mil-Spec SpringCo Enhanced XP 5 Coil Spring and Crane O-ring Diamond Honed Front Bolt Bore Screws are Properly Torqued and Staked per Mil-Spec Heat Treated per Mil-Spec Gasket Sealed to Bolt Carrier with Permatex 3D per Mil-Spec Package Contents: Dark Storm Industries DS-15 AR-15 5.56x45mm Nato MIL-Plus Bolt Carrier Group What firearm models does the manufacturer say Dark Storm Industries DS-15 AR-15 5.56x45mm Nato MIL-Plus Bolt Carrier Group is compatible with? The manufacturer suggests that Dark Storm Industries DS-15 AR-15 5.56x45mm Nato MIL-Plus Bolt Carrier Group is compatible with AR-15Dark Storm Industries DSI-BCG-556-NIB: DS-15 AR-15 5.56 Nato Nickel Boron Bolt Carrier Group Black