Well, this is a first for me.
I just recently finished a 308 AR build, and it turned out great. Shooting some Federal Gold Medal Match then some middle of the road reloads, it was shooting quarter size groups at a 100" yards. Ran factory ammo great, had some ejection issues with the reloads but they were quickly thrown together. That is until my second range trip, third magazine in, when the bolt decided to shear off the bolt catch.
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This was a first for me. After doing a quick search of the interwebs when I got home, I saw that there is much debate about this in the pistol and large caliber AR world. Some say it happens, others say if everything is set up correctly, it should never. Thinking back on it, I do believe I got this part from our odd-and-in part bin when I assemblies it and wouldn't be surprised if it came from a budget lower parts kit, for what it is work. I ended up ordering a DPMS 308 bolt catch, which is made from spring steel.
Anyone else run into this? Thoughts are welcomed and I hope this helps someone avoid my mistake.