{"product_id":"rosco-556nato-300blk-bcg-phos-blk","title":"Rosco - 5.56 \/ 300 BLK Bolt Carrier Group, Phosphate\/Chrome","description":"\u003cp\u003eThe \u003cb\u003eRosco 5.56 \/ 300 BLK Bolt Carrier Group\u003c\/b\u003e is engineered to meet the demands of modern-day carbine shooters. Featuring a \u003cb\u003ePhosphate Coated\u003c\/b\u003e exterior and a \u003cb\u003eChrome Lined\u003c\/b\u003e gas key and bolt channel, this BCG is built for durability and performance. Designed in collaboration with Microbest, it ensures dependability for every use.\u003c\/p\u003e\u003cp\u003eThis bolt carrier group is \u003cb\u003eMIL Specification\u003c\/b\u003e compliant and includes a properly staked gas key for extended performance. It features a \u003cb\u003eShot Peened\/MP tested Matched bolt\u003c\/b\u003e with an upgraded extractor for extreme accuracy. The BCG is rated for full-auto fire, making it suitable for rigorous use by both consumers and military personnel.\u003c\/p\u003e\u003cp\u003eConstructed with high-quality materials, the carrier is made from \u003cb\u003e8620 Steel\u003c\/b\u003e, while the gas key is crafted from \u003cb\u003e4130 Steel\u003c\/b\u003e and secured with Grade 8 hardware. The cam pin is made from hardened \u003cb\u003e4340 Steel\u003c\/b\u003e, and the firing pin is \u003cb\u003e8740 Steel\u003c\/b\u003e, heat-treated, and hard chrome plated. The bolt material is \u003cb\u003eC158\u003c\/b\u003e, phosphate coated, and MPI\/HPT tested for reliability.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eKey Features\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003ePhosphate Coated:\u003c\/b\u003e Durable exterior finish\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eChrome Lined:\u003c\/b\u003e Gas key and bolt channel for enhanced performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFull-Auto Rated:\u003c\/b\u003e Suitable for rigorous use\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eProperly Staked Gas Key:\u003c\/b\u003e Ensures reliability\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eShot Peened\/MP Tested Bolt:\u003c\/b\u003e Matched for extreme accuracy\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eUpgraded Extractor:\u003c\/b\u003e Enhanced locking with extensions\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCarrier Material:\u003c\/b\u003e 8620 Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGas Key Material:\u003c\/b\u003e 4130 Steel with Grade 8 hardware\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFiring Pin Material:\u003c\/b\u003e 8740 Steel, heat-treated, hard chrome plated\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eExtractor Material:\u003c\/b\u003e 4140 Steel, heat-treated, shot peened\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eSpecifications\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eColor:\u003c\/b\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eType:\u003c\/b\u003e Bolt Carrier Group\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSubCategory:\u003c\/b\u003e Bolts \u0026amp; Bolt Carrier Groups\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eManufacturers Part Number:\u003c\/b\u003e ROS-BCG-002\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eProduct UPC:\u003c\/b\u003e 850039693113\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Rosco Manufacturing","offers":[{"title":"Default Title","offer_id":47498875994201,"sku":"RSR-ROS-BCG-002","price":205.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0595\/9860\/2329\/files\/roscomanufacturing_RSR-ROS-BCG-002-1.jpg?v=1792330646","url":"https:\/\/mountainready.online\/products\/rosco-556nato-300blk-bcg-phos-blk","provider":"mountainready.online","version":"1.0","type":"link"}