[quote=@Whoami]
<Snipped quote by vietmyke>

Do I sense a lore addition?
[/quote]

Its a pretty open world, everything everyone makes is pretty much a lore addition, some are just more apparent than others- this would probably be a more apparent addition, especially since the sentry is a lot cheaper than the sentinel, it'd make sense that they'd try to modify the sentries to save costs.