i am getting my new bushmaster HBAR 20" barrel tomorrow. i sold my 14.5" barrel. is the anything special i new to get done to it when i stall it. i know how to install a barrel but being that i am switching to a different one, do i need to get anything inspected? my buddy said to get a gunsmith to check the head spacing and something else. don't remember. i thought they were universal and all fit the same and would work with the BCG.![]()



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