Armory Dynamics True Mil-Spec Bolt Carrier Group AR15/M4 with the gas key properly staked, chromed lined interior and full auto rated. It is made from case hardened steel and then shot peened. It is Magnetically Particle Tested (MPI) and High Pressure Tested (HPI). CNC Machined after heat treatment to ensure the evenness of treatment. All surfaces are then honed to a super smooth surface. The finish has an advanced low friction nitrite coating to minimize the excessive use of lubricants. 

The honing process of our BCG's provide increased life of the gas rings and allow immediate normal use instead of a break in period.

Shot peening is a cold working process used to produce a compressive residual stress layer and modify mechanical properties of metals.

Carrier fits AR15/M4 compatible style Rifles (i.e.) .223/5.56mm, .300Blkout

Carrier Specifications:

  • Material: Case Hardened 8620 Steel
  • Finish: Black Nitride. This advanced low friction coating minimizes the need for lubricants
  • Gas Key: 4130 Steel attached with Grade 8 hardware and properly staked into a milled “valley” to ensure proper positioning
  • Cam Pin: Hardened 4340 cam pin
  • Firing Pin: Mil Spec firing pin made of 8740 steel, center-less ground and Hard Chrome coated Bolt Assembly
  • All surfaces honed and super smooth before coating with Nitride

Bolt Specifications:

  • The Bolt is “true” Mil Spec dimension and external surfaces are CNC ground after heat treat for a precision fit
  • Material: Case Hardened 9310 Steel.
  • Finish: All Bolt components Shot Peened
  • All surfaces homes for a super smooth surface before coating
  • Extractor: 4340 Steel , Manganese Phosphate coated
  • Mil Spec Extractor Spring & O-Ring Combination
  • MPI: Magnetic Particle Inspected
  • HPT: High Pressure Test
  • Made in USA (Florida)

1 in stock

AR & AK Parts Caliber

Armory Dynamics

AR & AK Parts Caliber

.223, .556

AR & AK Parts Item Type

Bolt Carriers

Armory Dynamics

Armory Dynamics Manufactures Quality Ar's and components. We also provide many associated product around the AR platform.

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Shipping Policy

Shipping Time -- Most orders will ship the next business day, provided the product ordered is in stock. Orders are not processed or shipped on Saturday or Sunday, except by prior arrangement.

Orders are not process during federal or national holidays

We cannot guarantee when an order will arrive by the carrier. Consider any shipping or transit time offered to you by this site or other parties only as an estimate. We encourage you to order in a timely fashion to avoid delays caused by shipping, carrier delays or product availability.  Holiday shipping and inclement weather may increase shipping time and routing of packages. We cannot refund shipping charges due to carrier shipping delays.

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Returns & Cancellations

We will gladly accept the return of "Armory Dynamics" products that are defective due to defects in manufacturing and/or workmanship . Fulfillment mistakes that may be made which result in the shipment of incorrect products to you will also be accepted for return. Damages or defects must be reported within three days of receipt. Item must be returned for inspection prior to any refund. No returns after 14 days. Other returns are subject to a 20% (30% for FFL transferred items) restocking fee and shipping charges are non refundable. Cancelling an order prioer to shipping are suject to 20% restocking fee.

Items cannot be returned and are considered used once factory packaging is opened. We also carry and use and ship products from other manufactures. Contact the manufacturer of the product directly for warranty consideration.

Shipping charges are still incurred on item shown to have free shipping. Any shipping charges are non-refundable and are deducted prior to restocking fee.

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Your receipt of an electronic or other form of order confirmation does not signify our acceptance of your order, nor does it constitute confirmation of our offer to sell. Armory Dynamics reserves the right at any time after receipt of your order to accept or decline your order for any reason or to supply less than the quantity you ordered of any item.


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In the event a product is listed at an incorrect price due to typographical error or error in pricing information received from our suppliers, Armory Dynamics shall have the right to refuse or cancel any orders placed for products listed at the incorrect price. Armory Dynamics shall also have the right to refuse or cancel any such orders whether or not the order has been confirmed and your credit card charged. If your credit card has already been charged for the purchase and your order is canceled, Armory Dynamics will issue a refund to your card in the amount of the incorrect price.

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