CMMG MK3 .308 Win Bolt Carrier Group

CMMG MK3 .308 Win Bolt Carrier Group is the complete package with a carrier, assembled bolt, firing pin, cam pin, and firing pin retaining pin. It's a great part to have on hand to keep you in the competition or for upgrading your experience and having some extra parts. The durability of this carrier group can be seen in its premium steel construction, phosphate finish, and chrome-lined interior, indicating that this group can stand a lot of heavy, continuous use. This complete MK3/LR-308 bolt carrier group is meant to utilize a .308 round. The company holds high standards and tight tolerances ensuring quality or performance.

Features:

• Complete MK3/LR-308 bolt carrier group for .308
• 9310 steel, phosphate finish bolt
• 8620 steel, chrome-lined, phosphate finish carrier
• S7 tool steel, phosphate finish extractor
• Lifetime Quality Guarantee from CMMG

CMMG has made each component of this carrier group from a different material, each the best suited for the job they are performing. The bolt is 9310 steel which is mostly utilized in the aerospace industry and produces extreme durability, toughness, and high-core strength. For this bolt it means high strength and durability which lead to longevity in the group. The carrier is made from 8620 steel with a chrome lining, also for increased durability and smooth action. The extractor is fashioned from S7 steel, often used in this application due to its strength, resistance to impact, and moderate ability to resist softening at high heat. When added together this combination of materials offers an excellent bolt carrier group. Considering the quality and value for a mid-range price point, CMMG has a winner on its hands.