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Questions & Answers
Is this MPI? Magnetic partical inspected. Expert Answer

Yes. The AT3 Tactical AR-15 Bolt Carrier Group uses MPI tested 9310 Steel for the bolt material.

by Ethan, Gear Expert, May 9, 2022
Color: Black Finish: Salt Bath Nitride Caliber: .300 AAC Blackout , .350 Legend Gun Make: AR Platform Condition: New Weight: 11.5 oz

Code: 4U2-BCG-ATT1235-BCG-M16-BN

MPN: BCG-M16-BN

UPC: 5060748421173

List: $114.99Save 21%
$90.65

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Product Info for AT3 Tactical AR-15 Bolt Carrier Group (BCG)

AT3 Tactical is bringing you the best with this Top-Tier Black Nitride Bolt Carrier Group BCG.image

It features a black salt bath nitride finish, MPI inspected bolt, properly staked grade 8 gas key screws.

The black nitride finish features excellent hardness and lubricity, which means this BCG is durable, easy to clean, and less reliant on lubrication when compared to mil-spec phosphate coating.

The Bolt Carrier Group BCG is the workhorse of your rifle, and a quality BCG is critical to reliable rifle function.

Specifications for AT3 Tactical AR-15 Bolt Carrier Group (BCG):

Manufacturer: AT3 Tactical
Color: Black
Finish: Salt Bath Nitride
Fabric/Material: Steel
Caliber: .350 Legend, .300 AAC Blackout
Gun Make: AR Platform
Condition: New
Weight: 11.5 oz
Bolt Material: 9310 Steel
Carrier Material: 8620 Steel

Features of AT3 Tactical AR-15 Bolt Carrier Group BCG

  • Finish type: Black Salt Bath Nitride
  • Carrier Type: M16 Auto (Ideal for AR-15)
  • Carrier Material: 8620 Gun Steel
  • Gas Key Material: 4130 Steel
  • Gas Key Screws: Grade 8
  • Bolt Material: MPI tested 9310 Steel, Shot Peened
  • Extractor Material: 4140 Steel
  • Cam Pin Material: 8620 Steel
  • Firing Pin Material: 4140 Steel, Chrome Plated
  • Mil-Spec O-Ring and Gas Rings

Package Contents:

  • AT3 Tactical AR-15 Bolt Carrier Group

AT3 Tactical AR-15 Bolt Carrier Group (BCG) Orderable Models

List of Orderable Models

AT3 Tactical AR-15 Bolt Carrier Group BCG, 5.56 NATO/.300 Blackout, Black Nitride, BCG-M16-BN , MPN: BCG-M16-BN , UPC: 5060748421173 , Code: 4U2-BCG-ATT1235-BCG-M16-BN

AT3 Tactical AR-15 Bolt Carrier Group (BCG) Unavailable & Discontinued Models

List of Unorderable Models

USED AT3 Tactical AR-15 Bolt Carrier Group BCG, 5.56 NATO/.300 Blackout, Black Nitride, BCG-M16-BN, EDEMO1, Condition Parts Only/Salvage, Defective , MPN: BCG-M16-BN-EDEMO1 , Code: 4U2-BCG-ATT1235-BCG-M16-BN-EDEMO-DF-F
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