If you've got the bandanna, them my favourite method of negotiating the stairs is to use the FA-MAS. First, nearly empty the clip and when you're down to the last few bullets – they fire as ‘tracer rounds’. Equip the bandanna (so that the clip does not refresh) and just leg it up the stairs blasting the crap out of anything that moves with tracer rounds flying everywhere – maximum violence - sweet :thumbsup: