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I'm putting together my first build with a 10.5inch 300 Blackout barrel. I'm used to shooting the slightly longer 14.5inch barrels out of M4s so I wanted to give this one as much handguard as I could so I can have a comfortable pull. Since the last half inch of the barrel is all thread and some amount goes into the upper receiver, would a 10" handguard not give me enough room to properly fix a muzzle break or can on it? I know different handguards and barrels can differ but I was wondering if there's a common consensus about how much room you want to give the end of the barrel.