Toolcraft 308 BCG Nickel Boron Bolt Carrier Group

This Toolcraft 308 Bolt Carrier Group is finished in Nickel Boron and is designed for use in DPMS pattern AR10 rifles chambered in the 308 family of calibers. It is a full auto BCG and has forward assist serrations.
Nickel Boron is an extremely durable finish with self-lubricating properties so your AR10 cycles smoother and requires less lubrication. Toolcraft has the Nickel Boron finish applied by UCT Coatings of Palm City FL, the same company that applies it for Fail Zero BCGs. Called EXO Technology, this is a patented process that applies a Nickel Boron finish so durable that it is specified on Army 81mm and 60mm mortar tubes, Blackhawk helicopter hoists, and for hard use applications on some Navy ships!  IMO, this may be the ultimate upgrade to the All-American AR-10. And it looks good too! Bolt Shot Peened; MPI
Bolt Material 9310 Steel
Bolt Finish Nickel Boron
Caliber 308 Winchester Family and 6.5 creedmoor
Extractor O-ring Viton; Mil Spec
Carrier Material 8620 Steel, Toolcraft Proprietary
Carrier Finish Nickel Boron
Carrier Design Full Auto
Gas Key Material 4130 Steel; Grade 8 Gas Key Screws
Cam Pin Material 4140 Steel
Cam Pin Finish Nickel Boron
Firing Pin Material 8740 Steel; Hard Chrome Plated
Manufacturer Toolcraft
Markings TSS
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.