04-11-2021, 03:30 PM
(04-11-2021, 02:03 PM)trianglevelvet Wrote: You guys over at SixFive have sold a bunch of grendel bolts over the years right?
And your bolts are nitrided?
I've got someone on another forum trying to tell me that nitrided grendel bolts are no good and often break due to overly brittle steel caused by nitriding.
I assume that if this was an issue you folks would have encountered it, assuming that a fair amount of your customers reload and occasionally overpressure em.
Is the bolt lug breakage issue basically a problem of the past due to better alloys and better control during the nitriding step?
I'm not affiliated with SixFiveArms, just a satisfied customer with both their service and products. I am the one that posted the information about their bolts after a couple of people were asking about their 20" ARC barrels.
When I saw the comment on the other site from a different user saying to NEVER use nitrided Grendel bolts (and later any nitrided bolt), I contacted SixFiveArms to let them know that I had inadvertently caused a controversy on that site with a post about the information on their MONSTER bolt and that other users are now questioning the nitrided bolts they own that are not even MONSTER branded.
Here is what I got from the owner of SixFiveArms:
They have long been aware of the QPQ bolt embrittlement issue and resolved it a decade ago with the correct heat treatment with the Grendel bolts that they supply.
They've sold thousands of nitrided MONSTER bolts and barrels and they are good to go.
If you do some checking on both the 65Grendel forum and here there are a LOT of people that have bought both barrels and bolts from SixFiveArms and are happy with the products purchased.
If there was a problem with nitrided bolts I would expect to see way more people reporting that they are sub standard.
My 2 cents anyways.