
Originally Posted by
constructor
The company that carburizies the bolts and carriers we machine brings the core of both up to apx 50 for maximium toughness of the parts. I'm not saying what our exterior is but those 2 parts can be either to hard and brittle or not hard enough.
I've seen some bolts on the market that are so hard they chip at the edges around the cam pin hole and I've seen another brand that (I believe are 8620) are so soft that the lugs compressed. I have cut a carrier from that same company in half with a $9 hacksaw, I'm not sure it was tempered at all.
I would like to see some company Melonite a bolt to see how it holds up ...in their own rifle.

You offer NC DI bolts? If so any feedback so far on expected lifespan?
And for what it's worth, I had my HK416 bolt NC-QPQ treated so i'll be able to give a sample of 1 feedback as time progresses.
So far it's got just under a thousand rounds through it with virtually no visible wear. I know that means nothing for microscopic fatigue cracks that may be forming though.
It is missing the point to think that the martial art is solely in cutting a man down; it is in killing evil. It is in the strategem of killing the evil of one man and giving life to ten thousand -Yagyu Munemori
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