Dark Storm Industries DS-15 AR-15 5.56 Nato MIL-Plus Bolt Carrier Group Phosphate Chrome

Dark Storm Industries DS-15 AR-15 5.56 Nato MIL-Plus Bolt Carrier Group Phosphate Chrome. 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 5.56 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 5.56 Nato MIL-Plus Bolt Carrier Group Mil-Plus Enhanced Geometry with Mil-Spec Compatibility MPI Tested Material per AMS 2301 Mil-Spec Carburized Heat and Cryogenic Treatment (NOT Nitrided) Mil-Spec Manganese Phosphate per MIL-STD-171 5.3.1.2 Heat Treated per Mil-Spec SpringCo Enhanced XP 5 Coil Spring and Crane O-ring Mil-Spec Carburized Heat Treatment (NOT Nitrided) Diamond Honed Front Bolt Bore M-16 Profile Tail Mil-Spec Hard Chrome on Front Bore per MIL-STD-171 1.2.2.2 Torx Plus 180k PSI Alloy Steel Screws (Stronger than Grade 8) 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 Heat Treated per Mil-Spec Mil-Spec Hard Chrome per MIL-STD-171 1.2.2.4 Package Contents: Dark Storm Industries DS-15 AR-15 5.56 Nato MIL-Plus Bolt Carrier Group What firearm models does the manufacturer say Dark Storm Industries DS-15 AR-15 5.56 Nato MIL-Plus Bolt Carrier Group is compatible with? The manufacturer suggests that Dark Storm Industries DS-15 AR-15 5.56 Nato MIL-Plus Bolt Carrier Group is compatible with AR-15Dark Storm Industries DSI-BCG-556-PHC: DS-15 AR-15 5.56 Nato MIL-Plus Bolt Carrier Group Phosphate Chrome