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Toolcraft DLC Gray BCG 556

Maximum Purchase:
4 units
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Frequently bought together:


Free Shipping on all Toolcraft Bolt Carrier Groups! 

Other DLC colors: Toolcraft DLC Black BCG, and Toolcraft DLC FDE BCG

The Ionbond Diamond Like Carbon (DLC) finish is an incredibly hard (90 Rockwell) self-lubricating finish. This makes it extremely resistant to wear and corrosion.  This also makes it an ideal finish for a critical part like an AR15 bolt carrier group.

Toolcraft uses state-of-the-art machinery, processes and quality control to ensure that every bolt carrier group is capable of the most demanding missions. This has made Toolcraft a first choice of OEMs and the U.S. Military.

This Toolcraft DLC Bolt Carrier Group comes complete with a 9310 grade tool steel bolt. This bolt steel is 7% stronger than commonly used MILSPEC Carpenter 158 steel. This tougher than MILSPEC bolt, when paired with Toolcraft quality and the Ionbond DLC finish is quite likely the ultimate hard use bolt carrier group!

This is a 223/5.56/300 Blackout bolt carrier group.

This BCG will not work with 6.5/6.8/308 etc.

Toolcraft products carry a Lifetime Warranty.

See our views of Toolcraft BCGs here - Toolcraft Gallery

Like to know more? Get more details on "The Diamond" (Pictures too!) here: Toolcraft Diamond DLC BCG Review - The Best BCG Ever Made?


Bolt Shot Peened; MPI
Bolt Material 9310 Tool Steel
Bolt Finish Diamond-Like Carbon (DLC)-Gray
Caliber 223 | 5.56 NATO | 300 Blackout
Extractor O-ring Viton; Mil Spec
Carrier Material 8620 Steel, Toolcraft Proprietary
Carrier Finish Diamond-Like Carbon (DLC)-Gray
Carrier Design M16 Full Auto Style
Gas Key Material 4130 Steel
Cam Pin Material 4140 Steel
Cam Pin Finish Diamond-Like Carbon (DLC)-Gray
Firing Pin Material 8740 Steel; Hard Chrome Plated
Manufacturer Toolcraft


Note: Some dealers are selling Toolcraft BCGs that have been finished after leaving Toolcraft. The finish on those BCGs would not be warrantied by Toolcraft. All Toolcraft bolt carrier groups sold by SpiceTac include the 100% no-questions-asked Toolcraft warranty.


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