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Mitchell Defense Enhanced AR-15 Carpenter 158 HP/MPI Bolt 5.56mm NATO/.223 Remington/.300 BLK Black

Mitchell Defense Enhanced AR-15 Carpenter 158 HP/MPI Bolt 5.56mm NATO/.223 Remington/.300 BLK Black

Mitchell Defense · Bolt Carrier Group

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Best price

$163.99at OpticsPlanet

In stock Sale checked Oct 13, 2026

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Where to buy

StorePriceAvailabilityBuyAdd to build
OpticsPlanet Best price $163.99Salechecked Oct 13, 2026 In stock Buy at OpticsPlanet
MidwayUSA $166.25checked Oct 13, 2026 In stock Buy at MidwayUSA

Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.

Price history

Lowest in-stock price in the last 30 days: $163.99 at OpticsPlanet. Dashed line = out of stock. Tracking since Oct 12, 2026.

Show the prices as a table
StoreLatestLowestHighest
MidwayUSA$166.25$166.25$166.25
OpticsPlanet$163.99$163.99$163.99

Since Oct 12, 2026.

About this part

The Mitchell Defense Enhanced AR-15 Carpenter 158 HP/MPI Bolt 5.56mm NATO/.223 Remington/.300 BLK Black is an AR-15 bolt carrier group from Mitchell Defense. It's sold by 2 stores (2 in stock), from $163.99 to $166.25. The lowest in-stock price in the last 30 days was $163.99 at OpticsPlanet.

Fits and works with

Bolt
Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups

Specifications

Manufacturer
Mitchell Defense
Platform
AR-15
Caliber
300 Blackout
Material
Steel

From the manufacturer

Mitchell Defense Enhanced AR-15 Carpenter 158 HP/MPI Bolt 5.56mm NATO/.223 Remington/.300 BLK Black. 56 NATO .223 Remington and .300 BLK platforms. Machined from Carpenter 158 steel and HP/MPI tested it offers superior strength and fatigue resistance. A billet extractor with O-ring ensures stable extraction while SP4-coated gas rings provide improved lubricity and increased longevity. This bolt is an excellent upgrade or replacement for AR-15 rifles that require consistent long-term reliability. Specifications for Mitchell Defense Enhanced AR-15 Carpenter 158 Bolt: Manufacturer: Mitchell Defense Color: Black Finish: Nitride Fabric/Material: Steel Caliber: 5.56x45mm NATO .300 AAC Blackout .223 Remington Gun Make: AR Platform Gun Model: AR-15 Country of Origin: USA Features of Mitchell Defense Enhanced AR-15 Carpenter 158 Bolt Carpenter 158 bolt for superior tensile and fatigue strength Billet extractor with O-ring for improved extraction SP4-coated gas rings for extended service life Compatible with 5.56 NATO .223 Rem and .300 BLK platforms Ideal as a replacement or reliability-enhancing upgrade Package Contents: Mitchell Defense Enhanced AR-15 Carpenter 158 Bolt What firearm models does the manufacturer say Mitchell Defense Enhanced AR-15 Carpenter 158 Bolt is compatible with? The manufacturer suggests that Mitchell Defense Enhanced AR-15 Carpenter 158 Bolt is compatible with AR-15Mitchell Defense 651001: Enhanced AR-15 Carpenter 158 HP/MPI Bolt 5.56mm NATO/.223 Remington/.300 BLK Black

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$163.99 at OpticsPlanet
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