WCArmory has specified that Toolcraft apply the Toolcraft corporate logo to the left side of this carrier using a laser marking process, which is small and discreet. The Toolcraft logo laser marking allows you to easily identify this aweseome BCG in the future as you mix and match it in your multiple AR15 platform toys :)

Bolt Subassembly:

​Bolt: AISI 9310 alloy steel

MPI Inspected1

Extractor: Shot Peened Hardened D2 tool steel

O-Ring: Mil-Spec

Gas rings (3): Mil-Spec

Finish: Salt Bath Nitride2

Bolt Carrier:

8620 steel

Heavy Duty M16 design

Grade 8 Gas Key Screws, Staked

Gas Key Material: 4140

Finish: Salt Bath Nitride2

Cam Pin:

8620 steel

Finish: Salt Bath Nitride2

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.