Turrets and your own guns cannot shoot through plexdoors, of course. The enemy\'s guns can\'t shoot through your plexdoors, either mothership weapons or turrets, so it\'s just normal that yours can\'t shoot through plexdoors either. And this is not something to be fixed, it\'s logical, the block is still there, and you\'re not supposed to cover your turrets with them so that they don\'t get shot :P But if bullets went through, then the enemy could also kill your covered up turrets.