The manufacturer doesn't state if the Bootleg Inc Carrier Completion Kit is HPT and MPI. I recommend contacting the manufacturer for that information.
The Bootleg Inc Carrier Completion Kit only comes with one firing pin. That was a mistake that is being updated now.
The Bootleg Inc Carrier Completion Kit has a firing pin retaining pin made from 1038 steel wire, the bolt is 9310 steel coated in phosphorus, the cam pin is 4340 steel, and the firing pin is 4140 steel to ensure quality and durability.
This is Phosphate Coated.
Yes, this bolt is compatible with .300 Blackout.
Yes, this works for 5.56 as well.
Yes, it will work just fine.
This works for .223, 5.56, and .300 AAC.
Yes, those are included in the complete bolt.
We do not, but you should be able to find one on our site as well as left handed bolt carrier groups.