Possible Clues:

• Makes harsh rubbing noise - on nerves?
• It gets a bit rough if one fires what's there
• No thanks getting in them where there's firing
• You get no thanks in them if smoothness is lacking
• Where there's firing, roughly speaking
• Makes harsh sound by rubbing
• It causes friction to have them in here
• That's where they get fired - and one gets little thanks for being in there
• Makes harsh noise by rubbing - on nerves?
• In them you get no thanks for firing