Originally Posted by chloeshooter
The response: "the one you have isn't going to break unless you were going full auto non stop for a long long time" (which I won't)
This is true.
A BCG is unlikely to break or permanently fail. And that includes the bottom rung examples that may go out in Wally World ARs and such. But they can be more prone to temporary failure (if a little dirty) or lesser performance (cycling) especially with cheaper ammo. The cheaper options will have a shorter life, but we're talking about thousands (perhaps tens of thousands) of rounds down range.
As a builder I always use M16/C158 type BCGs from reputable manufacturers in my rifles...because they alleviate any potential issues
, and can be had for about the same price as the cheaper stuff. Plus it's always nice to have a high grade spare or two when you have a bunch of ARs.
Hyundai, Honda, and Lexus can all be fine cars. But if each is available for the same price, you're coming home with a Lexus...right? And this is the advantage in building. It's not so much about saving money, as getting the most from the money you spend.