Meh, look at these like cheap Norinco clones, like the Browning SA22 copies, the Norks were $150 new, so yeah buy a second for spare parts, or a third, Browning parts are insanely priced, throw a $400 bolt assembly in a $150 gun? No thanks lol.
I also don't think there is much difference these days between the cheapest Turk M4 and the most expensive, finishing sure, better paint on the high dollar ones no doubt, but as to soft bolts/pistons, it's either luck or the draw or they all got it sorted out now.
Shoot them, clean and lube after, probably gonna last lifetime. It's not a complicated design, easy to break down and clean everything, Benelli parts are mental insane expensive, not much financial sense buying those to keep these running. Just buy another one for $500 and have all the spare parts lol