In my opinion, you would be better served by a well designed MLOK handguard and an Atlas CAL bipod. I have no experience with the BLK LBL product but there's just something about it that screams "I'll fuck you over the first chance I get". I mean the foot print is kind of narrow, the bottom portion of the rail has next to no support it looked like, the bipod is held up by magnets, not a fan of where they put the tensioner, and overall the bipod looks kinda flimsy.
In my book, it'd be a hard pass. There's a reason you don't see them around.