The Aero Precision APRH100615 Complete 5.56x45mm NATO AR-15 bolt carrier group in black nitride is a precision-engineered component built for shooters who want a reliable, low-maintenance BCG without compromise. Whether you're assembling a rifle from the ground up or upgrading an existing build, this black nitride-coated carrier delivers the durability and performance that serious AR-15 shooters expect from Aero Precision.

Built from 8620 steel for the carrier and 9310 steel for the bolt, this BCG is machined to mil-spec standards and shot peened for strength. The black nitride finish is engineered to reduce friction and minimize the reliance on frequent lubrication and deep cleaning—a practical advantage whether you're running suppressed, at the range, or in the field. Forward assist serrations are cut into the carrier, and the gas key is properly staked with Grade 8 hardware to ensure it stays put through thousands of rounds.

The bolt features mil-spec design with an MPI mark confirming its quality. The extractor comes with a black o-ring insert and Viton O-ring for reliable brass ejection. All the small details that matter—proper gas key shrouding, shot-peened surfaces, and precise machining—are here because Aero Precision knows that a BCG is the heartbeat of your rifle's reliability.

Key Features

• 8620 steel carrier, 9310 steel bolt—precision-machined for durability and performance
• Black nitride finish reduces friction and minimizes cleaning demands
• M16-cut carrier with forward assist serrations
• Properly staked gas key with Grade 8 hardware and mil-spec design
• Shot-peened bolt and MPI-marked for integrity verification
• Black o-ring extractor insert with Viton O-ring for reliable function
• Mil-spec construction throughout

Specifications

Caliber	5.56x45mm NATO
Platform	AR-15
Carrier Material	8620 Steel
Bolt Material	9310 Steel
Finish	Black Nitride
Gas Key	Forged, mil-spec, properly staked
Extractor	Tool steel with black o-ring insert and Viton O-ring
Carrier Style	M16-cut with forward assist serrations

Frequently Asked Questions

Is this BCG compatible with standard AR-15 uppers and lowers?

Yes. This bolt carrier group is mil-spec 5.56x45mm NATO and works with any standard AR-15 upper and lower receiver.

What's the advantage of black nitride over chrome-lined phosphate?

The black nitride finish is an advanced coating that reduces friction and minimizes the need for frequent lubrication and cleaning compared to traditional phosphate finishes. It requires less maintenance while still delivering mil-spec reliability.

Is the bolt MPI tested?

Yes. The bolt is shot peened and marked MPI (magnetic particle inspection), confirming it has been tested for internal defects.

Does this come with the Aero Precision 'A' logo?

The product name indicates this is the version without the Aero 'A' logo on the carrier.