It is my understanding that the A/C/K's are the same as a Beman Matrix !

They are heavier because they use a thicker aluminum core shaft .......but they are not as durable as an A/C/C because they only have 2 wraps of carbon versus 3 wraps (like an A/C/C) !

I didn't have good luck with the Matrix !!

If your wanting to stick with carbons.......Carbon Express has a heavy version and Gold Tip has the big game arrows that are heavier !!