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Questions & Answers
Customer Reviews
Helpful Positive Review Midwest Industries 5.56/AR15 C158 Bolt Carrier Group by RickH, February 14, 2021
Excellent BCG. The fit and finish are comparable to the best. Perfect staking on the gas key. I've been running it hard in a 16" carbine length gas system, no issues at all. I would definitely buy again.
3/3 found this helpful
Helpful Positive Review Well built BCG by ARey, Verified Owner, October 29, 2020
Bought for my first AR build and it has a good finish and feels sturdy. MI is known for having pretty good AR parts and will be testing that when I go to the range. Good price for a BCG considering a lot of parts are on backorder right now.
1/1 found this helpful
Read All 2 Reviews
Color: Black Finish: Nitride Caliber: 5.56mm Gun Make: AR Platform Gun Model: AR-15 , M16 Hand: Right Weight: 11.4 oz

Code: MWI-BCG-ARCBC-MI-BCG-NIT

MPN: MI-BCG-NIT

UPC: 812102032946

List: $167.95Save $10.00
$157.95

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Product Info for Midwest Industries 5.56/AR15 9310 Bolt Carrier Group (BCG)

Midwest Industries Bolt Carrier Group BCG come in Black Nitride, Nickel Boron, DLC Flat Dark Earth and Titanium Nitride! The Carpenter 158 Bolt is heat treated, shot peened, precision ground for perfect dimensions, and MPI Tested. The 4140 Billet Gas Key is properly torqued with Grade 8 fasteners, and properly staked to ensure reliability. The 4140 Billet Cam Pin is nitride treated for wear resistance. The Billet Machined Extractor is machined from solid 4140 bar stock, heat treated and shot peened, coated for reliable extraction, extractor insert, and O-Ring are included.image

WARNING: California`s Proposition 65

Specifications for Midwest Industries 5.56/AR15 9310 Bolt Carrier Group (BCG):

Manufacturer: Midwest Industries
Color: Black
Finish: Nitride
Fabric/Material: Stainless Steel
Carrier Material: 8620 Steel
Bolt Material: 9310 Steel
Caliber: 5.56mm
Gun Make: AR Platform
Gun Model: M16, AR-15
Hand: Right
Weight: 11.4 oz
Country of Origin: USA
Gun Type: Rifle

Features of Midwest Industries 5.56/AR15 9310 Bolt Carrier Group BCG

  • Assembled Bolt Carrier Group BCG for AR-15/M16
  • 8620 M16 style carrier
  • HM Black Nitride finish
  • Properly heat treated
  • Final grind before plating
  • Carpenter 158 5.56/.223 bolt
  • Heat treated
  • Shot peened
  • Precision ground for perfect dimensions
  • MPI - Magnetic Particle Inspected
  • 4140 Billet Gas Key
  • Properly torqued with Grade 8 fasteners
  • Properly staked to ensure reliability
  • 4140 Cam Pin
  • Heat Treated
  • Billet Machined Extractor
  • Machined from solid 4140 bar stock, heat treated and shot peened
  • Phosphate coated for reliable extraction
  • Extractor insert included
  • O-Ring included
  • Firing pin precision machined from 17-4 H-900 Stainless Steel

Package Contents:

  • Midwest Industries 5.56/AR15 9310 Bolt Carrier Group
  • Extractor Insert
  • O-Ring Included

Midwest Industries 5.56/AR15 9310 Bolt Carrier Group (BCG) Orderable Models

List of Orderable Models

Midwest Industries Bolt Carrier Group BCG 9310, 5.56/AR15, Black, Titanium Nitride Finish, MI-BCG-NIT , MPN: MI-BCG-NIT , UPC: 812102032946 , Code: MWI-BCG-ARCBC-MI-BCG-NIT

Midwest Industries 5.56/AR15 9310 Bolt Carrier Group (BCG) Unavailable & Discontinued Models

List of Unorderable Models

Midwest Industries Bolt Carrier Group BCG C158, 5.56/AR15, Nickel Boron, Titanium Nitride Finish, MI-BCG-NIB , MPN: MI-BCG-NIB , UPC: 812102032953 , Code: MWI-BCG-ARCBC-MI-BCG-NIB
Midwest Industries Bolt Carrier Group BCG C158, 5.56/AR15, FDE, Titanium Nitride Finish, MI-BCG-FDE , MPN: MI-BCG-FDE , UPC: 812102032960 , Code: MWI-BCG-ARCBC-MI-BCG-FDE
Midwest Industries Bolt Carrier Group BCG C158, 5.56/AR15, Tin Gold, Titanium Nitride Finish, MI-BCG-TIN , MPN: MI-BCG-TIN , UPC: 812102032984 , Code: MWI-BCG-ARCBC-MI-BCG-TIN
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