Legally- the gun manufactures don't jave to do anything If it was an ammo/case failure--- good luck getting a Turkish ammo manufacturer to stand behind theor ammo.. the best bet might be to try whoever imported it to the us-- not sure they would do anything either.
I had a cheepo semi auto "hatfield" shotgun sold by Walmart ( and a few others) that was made in Turkey.
It had a major flaw in the gas vent system and it would shatter the wood forend --- multiple times. It was a royal pain trying to get responses or parts for it--- eventually over 16 months I was able to get 2 new handguards but the both shattered too---- the 2rd time the company would no longer respond to my calls or emails.
I'm glad no one has been hurt yet. Hopefully the sellers eventually get enough slack that they offer refunds but i doubt much will come from zsr . Time will tell.
From the few pics I've seen, it looks like the brass case is splitting near the head/base and causing the venting of gas.
I wonder if anyone has done any pull downs to check powder weights or section a piece of brass to see how thick it is near the head/web.