Description
Corpsie's Note: "Ion Bond" is Toolcraft's name for "DLC" or "Diamond Like Coating". It's slightly matte looking compared to nitriding. The pictured BCG is nitrided.
Description from WCarmory
New, by popular demand, all AR-15 Toolcraft BCG's sold by us here at WCArmory3 will feature Mil-Spec Carpenter No. 158 Bolts.
Bolt Subassembly:
Bolt: Carpenter No. 158 Alloy Steel, Shot Peened
MPI Inspected1
Extractor: Shot Peened Hardened D2 tool steel
O-Ring: Mil-Spec
Gas rings (3): Milspec
Coating: Ion Bond (DLC Tribo-41) coating2
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 on faceted model may or may not be plated.
Coating: Ion Bond (DLC Tribo-41) coating2
Cam Pin:
8620 steel
Coating: Ion Bond (DLC Tribo-41) coating2
Firing Pin:
mil-spec firing pin made from centerless ground 8740 steel
Coating: hard chrome
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.
I bought one of these, received it and it's GTG in terms of an initial quality inspection, so I posted the deal.
I got it because Ion Bond (DLC) is supposed to hold oil better than nitride.