I bought the 16" 7.62x39 AR-15 upper back in 2020 and it's still going strong! I'd estimate it has at least 2000 rounds of all types through it. Brass, steel, doesn't matter, it eats it all. Runs great and is accurate enough. Is this a sub moa gun? Not with me shooting it but then again 7.62x39 isn't really a sub moa roundn( in most cases). Buy it, you won't regret it.