Toolcraft 556 NATO Black Nitride BCG

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  • Toolcraft Black Nitride AR15 BCG 556 Lifetime Warranty Over 100 5-Star Reviews
  • Tool Craft BCG For Sale Also See Our Review
  • Toolcraft BCG C158 Carpenter 158 Bolt


Toolcraft makes some of the best AR15 bolt carrier groups on the market today. Precision manufactured on state-of-the-art CNC machinery in North Carolina, Toolcraft products are trusted by the U.S. Military and carry a lifetime warranty.

Finish is Black Nitride which is a metal treatment that produces a case-hardened surface. The resulting finish is extremely wear and corrosion resistant and very slick. This means less friction and smoother, more reliable function. The rich black color on these BCGs looks great on the Black Rifle! 

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

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

Bolt Shot Peened; MPI
Bolt Material 9310 or Carpenter 158 Steel
Bolt Finish Black Nitride
Caliber .223 | 5.56 NATO | 300 Blackout
Extractor O-ring Viton; Mil Spec
Carrier Material 8620 Steel
Carrier Finish Black Nitride
Carrier Design M16 Full Auto Style
Gas Key Material 4130 Steel
Cam Pin Material 4140 Steel
Cam Pin Finish Black Nitride
Firing Pin Material 8740 Steel; Hard Chrome Plated

Lifetime Warranty

Lifetime Warranty

Toolcraft products carry a lifetime warranty. Simply put - should any of our products fail, return it to us for a brand new replacement.

A note from Toolcraft

Toolcraft carriers are made from the best materials that can be purchased in the market today. Regardless of the coating you choose, the carrier that it protects is made the right way, with no compromise of standards using materials that are Made in the USA. There is the basic 8620 steel, a better grade of Gun Quality 8620 steel, an even better grade of Aircraft Quality 8620 steel, but then there is the best Aircraft Quality 8620 steel that is proprietary to Toolcraft only and no one else. These high standards of materials set us apart from the rest.

While some manufacturers have compromised the Mil-Spec standards of machining just to add to their profits, Toolcraft has stayed loyal to the Mil-Spec machining standards since the beginning.

All Toolcraft carriers are post-heat treat machined to remove any distortion that has occurred during the heat treat process. We first grind the outside rails that are in contact with the upper after heat treat. Next, we machine the inside bore where the bolt is doing the work. This ensures the gas rings are not damaged and that the weapon cycles and charges smoothly. These standards are not just met, but we exceed them on every operation during the machining processes and this effort gives our carriers a superior finish with no machining lines.

Toolcraft machines each carrier to last for thousands of rounds and that is why we can offer with confidence a Lifetime Warranty on our products. These standards have given each consumer the confidence that when they use a Toolcraft bolt carrier group in their weapon, it will do what it was created to do, round after round for years to come.

Customer Photos

Below: Toolcraft Black Nitride bolt up close showing Magnetic Particle Inspection (MPI) mark

 toolcraft-ar-15 bcg for sale

Below: Bet-your-life reliability (1100 rounds without cleaning) from this AR pistol build using Aero Precision Upper Receiver with no Forward Assist, Ballistic Advantage 11.3 Hansen 556 NATO barrel, Toolcraft Black Nitride BCG, Radian Weapons Raptor charging handle, and SBA3 pistol brace.  


Below: Following a 1100 round Toolcraft BCG review with Federal M193 and Wolf Gold. Dirty but reliable. 


Below: AR pistol build using a SB Tactical SBA3 brace, old-school cool 1913 picatinny quad rails and a Toolcraft Black Nitride Bolt Carrier Group


Below: Short AR15 (pistol build) with Toolcraft bolt carrier group and free float rail


Below: Scoped AR15 rifle for accurate long range shooting using reliable Toolcraft BCG


Below: AR-15 pistol build using M-LOK free float rails and Black Nitride Toolcraft bolt carrier group


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