Midwest Industries

Midwest Industries 556 Bolt Carrier Group, C158 Carpenter Steel, Black Nitride Coating

Midwest Industries Midwest Industries 556 Bolt Carrier Group, C158 Carpenter Steel, Black Nitride Coating - view 1
Midwest Industries Midwest Industries 556 Bolt Carrier Group, C158 Carpenter Steel, Black Nitride Coating - view 2
Midwest Industries Midwest Industries 556 Bolt Carrier Group, C158 Carpenter Steel, Black Nitride Coating - view 3
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Midwest Industries

Overview

The Midwest Industries 556 Bolt Carrier Group is designed specifically for the 5.56 NATO caliber, ensuring compatibility and optimal performance in your AR-15 platform. With its black nitride coating, this BCG provides enhanced corrosion resistance and improved lubricity, contributing to smoother cycling and easier maintenance. This component is commonly found in builds aimed at reliability and durability, making it a solid choice for both tactical and recreational shooting applications.

Specifications

MPNMIBCGNIT
FinishNitride
Caliber5.56 NATO

Available Merchants(6)

Prices checked

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Ammunition Depot logo
Ammunition Depot
~$28.90 est. shipping
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In Stock
$130
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Optics Planet logo
Optics Planet
Free shipping
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In Stock
$158
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BattleHawk Armory logo
BattleHawk Armory
Shipping varies
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In Stock
$158
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Palmetto State Armory logo
Palmetto State Armory
Free shipping
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In Stock
$158
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Brownells logo
Brownells
Free shipping
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Out of Stock
$158
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Sportsmans Outdoor Superstore logo
Sportsmans Outdoor Superstore
Flat rate shipping
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Out of Stock
$158
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Build history on GunPartPicker

Builders on GunPartPicker first added the Midwest Industries 556 Bolt Carrier Group, C158 Carpenter Steel, Black Nitride Coating to a build in February 2026.

It was hard to find in September 2026, in stock on only 17 of the 30 days we checked, and today 4 of the 6 retailers we track have it in stock. It dipped to $130.49 at Ammunition Depot for a stretch in September 2026, well under its usual $149.95 to $157.95, so sales do come around. Buying today, the lowest price is $130.49 at Ammunition Depot, which matches the best price we saw in September.

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