Using the Sprinco color chart, what's a good starting point for a build like this.
300blk, 7.5", 72 pistol gas port, full auto bcg, carbine tube, adjustable gas block.
300 std ammo for sure, may run some subs w/o a can.

Thinking to start with H1 buffer and a Red-White Sprinco spring, and then tune gas from there.
Seems to be lots of that flat wire stuff out there but there's no real no reference to be able to choose something like a Strike Industries carbine flat wire spring.

The 4clock ejection zone seems to be tied to "ideal" bcg speed, but if it cycles and locks on empty at 3clock, is that not ok?

I just looking for a good starting point. What say you?