I haven't messed with a Toolcraft BCG.
The two bolts that I saw snap in two were Radical.
I'd recommend the Sons Of Liberty BCGs. I haven't used one but I know good things about the company and they're the only company I know that's willing to list EXACTLY how their BCGs are made in the detail that they do.
A sons of guns bcg, blue dart don't know shat from shinola
Quit breathing through your mouth and maybe you'll get more oxygen to your brain. Sons Of LIBERTY, not Sons Of GUNS.