A similar but less catastrophic event happened to me.
Bought an AR 9 Pistol from PSA. Bought Ammo from Freedom. Went to the range and while collecting my brass, I found a bulging case. My range partner looked at it and said the firearm was firing out of battery. A frequent visitor to the range and reloader indicated it was an overcharged round. Either way I felt I had a problem. Contacted both PSA and Freedom. Both said it was the other guys fault but to send back the firearm and the ammo. PSA worked on the firearm for about a week, made adjustments and returned it to me. Freedom replaced all the unused ammo that was purchased at that time.
Bottom line, neither took the blame but both stood behind their products.