Midwest Industries Enhanced AR-15 Bolt Carrier Group, Black Nitride 5.56 NATO Full-Auto Profile MI-BCG-556EH

Product Description

The Midwest Industries Enhanced AR-15 bolt carrier group (BCG) is engineered to reduce carrier tilt and friction inside the upper receiver for smooth, reliable cycling. Built to meet or exceed mil-spec standards, it pairs a hardened 9310 bolt (shot peened) with a billet-machined, hardened 8620 carrier and a 4130 steel gas key secured with Grade 8 hardware using proper staking methods. Finished in black nitride for corrosion resistance and easy cleaning, this BCG is designed for 5.56 NATO/.223 AR-15/M16 platforms and proudly made in the USA.

Product Highlights

• Enhanced design helps reduce carrier tilt and internal friction in the upper receiver
• 9310 hardened bolt is shot peened for durability under hard use
• 8620 billet-machined carrier is hardened for long service life
• 4130 steel gas key with Grade 8 fasteners and proper staking methods
• Black nitride finish for corrosion resistance and simplified maintenance

Specs

• Brand: Midwest Industries
• Manufacturer Part Number: MI-BCG-556EH
• UPC: 812102033554
• Platform Compatibility: AR-15 / M16
• Cartridge Compatibility: 5.56x45mm NATO / .223 Remington
• Carrier Profile: Full-auto style
• Finish: Black nitride
• Materials: 9310 steel bolt; 8620 steel carrier; 4130 steel gas key
• Mil-Spec: Meets or exceeds mil-spec standards (per manufacturer/distributor listing)
• Weight: 11.4 oz
• Country of Manufacture: United States of America

Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product’s manufacturer.