That seems super cheap, like I'd worry about quality of the build cheap.
Mainly good just to learn what you're doing. Obviously don't dump ammo thru it nonstop and warp the barrel as I'm guessing it's not the best. I generally limit myself to one magdump at a time if it's a range day and let it cool before the next. Once you've assembled it it's gonna be pretty easy to replace a part if it fails. If it does it won't be catastrophic so long as you always run em super well lubed. I haven't built this kit but it's generally good advice for any AR, no sense in running em too hot for too long during practice.
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