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Toolcraft uses UCT Coatings in Florida, with the EXO coating. UCT is the originator of EXO coating, a patented, high-performance nickel boron coating. The carrier is round, plain (no engraving), and the nickel boron finish is buffed to an extremely impressive shine.
Bolt Subassembly:
Bolt: Carpenter No. 158 Alloy Steel, Shot Peened
MPI Inspected
Extractor: Shot Peened Hardened D2 tool steel
O-Ring: Mil-Spec
Gas rings (3): Milspec
Coating: Nickel Boron Plated
Bolt Carrier:
Heavy Duty M16 design
8620 steel, plated
Gas key: hardened billet 4140 machined, plated
Gas Key Screws,: Grade 8 properly staked (heavy strike), Screws may or may not be plated.
Nickel Boron Plated, High Sheen Buff Polish (UCT Coatings in Florida)
Cam Pin:
8620 steel Nickel Boron Plated (UCT EXO Finish)
Firing Pin:
mil-spec firing pin made from centerless ground 8740 steel, hard chrome coated
Notes:
1. All Toolcraft bolts are MPI inspected, but not necessarily marked MPI. WCArmory requests MPI marked bolts but Toolcraft can not guarantee that all MPI inspected bolts will be MPI marked. Email WCArmory for this disclaimer from the Toolcraft Operations Manager.
2. All BCG's are ordered direct from Toolcraft with the coating applied by Toolcraft's sub-supplier. All coatings are purchased and furnished direct from Toolcraft, and their full warantee is obviously valid.
3. WCArmory has been selling Toolcraft BCG's since 2009.
