{"product_id":"ar-15-m16-bolt-carrier-group","title":"Ar 15-m16 Bolt Carrier Group","description":"The ERGO AR15\/M16 Bolt Carrier Group is mil-spec M16 with forward assist serrations. Everything is Melonite coated (black nitride) except the extractor (phosphate) and the firing pin (chrome).\u003cbr\u003e\u003cbr\u003eSpecifications:\u003cbr\u003e\u003cbr\u003e- True Mil-Spec Bolt Carrier Group\u003cbr\u003e- Material: Case Hardened 8620 Steel\u003cbr\u003e- Finish: Black Nitride\u003cbr\u003e- Gas Key: 4130 Steel attached with Grade 8 hardware and properly staked\u003cbr\u003e- Cam Pin: Hardened 4340 cam pin\u003cbr\u003e- Firing Pin: Mil Spec firing pin made of 8740 steel, center-less ground and Hard Chromed\u003cbr\u003e- Bolt Assembly: The Bolt is Mil Spec dimension and external surfaces are CNC ground after heat treat for a precision fit\u003cbr\u003e- Bolt Material: Case Hardened 9310 Steel.\u003cbr\u003e- Finish: All Bolt components Shot Peened and Black Nitride (except extractor)\u003cbr\u003e- Extractor: 4340 Steel , Manganese Phosphate coated\u003cbr\u003e- Mil Spec Extractor Spring and O-Ring Combination\u003cbr\u003e- MPI: Magnetic Particle Inspected\u003cbr\u003e- Bolt: 9310 material, shot peened, MPI tested and hard engraved","brand":"Ergo","offers":[{"title":"Default Title","offer_id":22106183434319,"sku":"300216","price":185.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0092\/7861\/9727\/products\/GS300216.jpg?v=1555676519","url":"https:\/\/green-supply3.myshopify.com\/products\/ar-15-m16-bolt-carrier-group","provider":"Green Supply3","version":"1.0","type":"link"}