Originally Posted by
okie
I went back to that thread and looked, and last I could find they were at 30k rounds without breakage, vs the average 20k rounds he quoted for others. I want to say though that there was an update somewhere when one finally broke, and I want to say it was somewhere around 40k rounds. I might be making that up entirely, but I could almost swear I remember that.
In any case, 50% longer bolt life is pretty good in a milspec bolt. It's not a massive thing if we're talking 16 inch carbines, but when you start shortening that barrel things get wonky fast. For SBRs, I think Colt is the only logical choice. As far as I know, they're still the sole supplier of bolts for Mk18s.
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