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
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