Anderson AR-15 Complete Bolt Carrier Group – .223/5.56/.300

Description

The **Anderson AR-15 Complete Bolt Carrier Group** is a mil-spec, drop-in BCG chambered for **.223 Remington, 5.56 NATO, and .300 AAC Blackout**. Manufactured by Anderson Manufacturing in the USA, this fully assembled carrier is built to M16 profile and ready to run in any standard AR-15 platform right out of the package.

## Features & Specifications

– **Caliber Compatibility:** .223 Rem / 5.56 NATO / .300 AAC Blackout
– **Bolt Material:** Carpenter 158 steel — shot peened and magnetic particle (MPI) inspected
– **Carrier:** M16 full-auto profile, 8620 tool steel
– **Finish:** Manganese phosphate (parkerized) — black
– **Gas Key:** Properly staked Grade 8 fasteners, chrome-lined interior
– **Firing Pin:** Chrome-lined, retained by industry-standard cotter pin
– **Extractor:** Mil-spec with O-ring upgrade for reliable extraction
– **Fitment:** Drop-in ready for any mil-spec AR-15 upper receiver
– **Manufacturer:** Anderson Manufacturing (USA)

## What’s Included

– 1 × Complete Bolt Carrier Group (BCG) — fully assembled
– Bolt, carrier, firing pin, cam pin, firing pin retaining pin, and staked gas key

## Why Choose the Anderson BCG

Anderson Manufacturing has been producing firearm components since 1966 and is known for delivering mil-spec quality at an honest price. This complete bolt carrier group is a trusted upgrade or replacement part for AR-15 builds, range guns, and duty rifles alike. Every unit is inspected before it ships so you can install it and hit the range with confidence.

_Compatible with standard AR-15 / M4 upper receivers. Not intended for pistol caliber or 7.62×39 platforms._

The bolt carrier group is the heart of the AR-15’s direct impingement operating system. It contains the bolt, bolt carrier, firing pin, cam pin, and firing pin retaining pin — all the components that chamber, fire, extract, and eject each round. Anderson Manufacturing BCGs are machined to mil-spec dimensions, ensuring compatibility with standard AR-15 and AR-10 upper receivers and barrels from any manufacturer. Bolts are produced from Carpenter 158 steel and magnetic particle inspected (MPI) before assembly to detect surface and subsurface defects. Carriers are machined from 8620 steel and heat treated to mil-spec hardness. Finish options across the Anderson lineup include phosphate for standard mil-spec corrosion resistance, nickel boron for improved lubricity and easier cleaning, and nitride for a harder, more corrosion-resistant surface. A full-auto profile carrier is standard across the Anderson BCG lineup and is compatible with all semi-automatic AR-15 lower receivers. For builders assembling an AR-15 from components or for owners replacing a worn BCG, an Anderson Manufacturing BCG machined to mil-spec tolerances cycles predictably across standard carbine, mid-length, and rifle-length gas systems when paired with the correct caliber barrel.