The Branik guys can build normal CroMo or 300M and they are true 300M... I think they are a couple hundred cheaper than the competition and they can be made in virtually any length you want. They build mainly for rock crawlers and rock racers that dont have the power and torque that we do but the gearing, tire size and weight puts some incredible loads on their drivetrains... Their axles are strong!!! I won't say unbreakable, 'cause nothing is unbreakable... but they are VERY strong and they are true 300M if you want, but they can be made of softer and less expensive material too... I believe a few pullers are using them now with success... I know Bean is running them, but he has been breaking other stuff and hasn't really tested the axles fully yet, but I think some other pullers are using them too... Give Stan or Brandon a call 260.467.1808 and they can go through the details and possibilities. They are a father and son family shop in Indianna. Good guys for sure!!!