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Walker Defense Research Nickel Boron Bolt Carrier Group 5.56x45mm NATO/.300 AAC Blackout

Walker Defense Research Nickel Boron Bolt Carrier Group 5.56x45mm NATO/.300 AAC Blackout

Walker Defense Research · Bolt Carrier Group

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$169.99at OpticsPlanet

In stock Sale checked Oct 21, 2026

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OpticsPlanet $169.99Salechecked Oct 21, 2026 In stock Buy at OpticsPlanet

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Price history

Lowest in-stock price in the last 30 days: $169.99 at OpticsPlanet. Dashed line = out of stock. Tracking since Oct 19, 2026.

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Since Oct 19, 2026.

About this part

The Walker Defense Research Nickel Boron Bolt Carrier Group 5.56x45mm NATO/.300 AAC Blackout is an AR-15 bolt carrier group from Walker Defense Research. One store lists it, OpticsPlanet at $169.99. The lowest in-stock price in the last 30 days was $169.99 at OpticsPlanet.

Fits and works with

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

Specifications

Manufacturer
Walker Defense Research
Platform
AR-15
Caliber
300 Blackout
Finish
Nickel Boron

From the manufacturer

Walker Defense Research Nickel Boron Bolt Carrier Group 5.56x45mm NATO/.300 AAC Blackout. The bright satin finish serves as a functional surface that provides smooth reliable operation while offering excellent wear resistance and notably easier cleaning. Each BCG undergoes rigorous small-batch quality control throughout production. Walker Defense Research hand-matches components conducts High Pressure Testing (HPT) and performs Magnetic Particle Inspection (MPI) of each bolt. The gas key features enhanced staking using premium OCKS screws from Michiguns ensuring reliable operation under sustained use. The Nickel Boron BCG is compatible with direct impingement 5.56mm .223 Rem and 300 BLK AR-15 platforms. The polished nickel boron surface provides excellent wear resistance and smooth operation making this BCG particularly suitable for users seeking enhanced reliability in demanding conditions. Specifications for Walker Defense Research Nickel Boron Bolt Carrier Group: Manufacturer: Walker Defense Research Finish: Polished Satin Fabric/Material: 9310 Steel Carrier Material: 8620 Steel Bolt Material: 9310 Steel Caliber: 5.56x45mm NATO .300 AAC Blackout .223 Remington Gun Make: AR Platform Gun Model: M16 M4 AR-15 Hand: Right Condition: New Coating: Nickel Boron Country of Origin: USA Gun Type: Rifle Features of Walker Defense Research Nickel Boron Bolt Carrier Group Hand-Matched Component Fitment High Pressure Tested (HPT) Magnetic Particle Inspected (MPI) Bolt Enhanced Gas Key Staking with OCKS Screws Small-Batch Quality Control Smooth Low-Friction Surface Superior Wear Resistance Enhanced Cleaning Properties Package Contents: Walker Defense Research Nickel Boron Bolt Carrier Group What firearm models does the manufacturer say Walker Defense Research Nickel Boron Bolt Carrier Group is compatible with? The manufacturer suggests that Walker Defense Research Nickel Boron Bolt Carrier Group is compatible with AR-15 M4 M16Walker Defense Research NI-B-556: Nickel Boron Bolt Carrier Group 5.56x45mm NATO/.300 AAC Blackout

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$169.99 at OpticsPlanet
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