My can was finally released from NFA jail. And Im ready to build my 300 upper.

Im tring to figure out barrel length.
Currently looking at an ar stoner 7.5 or a 8in ballistic advantage. Problem im facing is finding a rail that fits the 7.5 and will let the asr flash hider and the can attach without rubbing but close as possible.

I was set on the 8in BA barrel and the 7in KMR then found the ar stoner barrel for 69 bucks vs the 155 for the BA barrel.