A PIECE is a gun, used by the Scoundrel class. The terms 'Piece', 'P.I.E.C.E.', and PIECE are used interchangeably throughout Starmourn, as it's become somewhat of a colloquial term for any kind of blaster or gun, rather than just a Prion Industries Electroswitching Compact Eradicator - kinda like how lasers don't get called L.A.S.E.R.s and radars don't get called R.A.D.A.R.s all the time.