i am in the process of building an ar with a 10.5" barrel. i read somewhere that i may not be able to use a front sight gas block with a bayonet lug on it. is that true? also, i would need to use a pistol stock, correct? i haven't ordered any lower parts yet so i want to make sure before i buy anything and can't use it. i live in ohio if that matters. any info would help greatly. :confused:

