QPR hit the Division Two summit as a double from striker Kevin Gallen helped sink promotion rivals Plymouth Argyle.
Paul Sturrock's side were undone by two goals in three minutes in the second half after Gallen's opener.
Gallen's fine 20-yard strike separated the sides at the interval before QPR upped the tempo after the break.
Tony Thorpe settle QPR nerves with another 20-yarder midway through the half before Gallen finished Argyle off.
QPR: Day, Edghill, Forbes, Carlisle, Padula, Rowlands, Bean,
Bircham, McLeod, Thorpe, Gallen. Subs: Palmer, Shittu,
Ainsworth, Sabin, Pacquette.
Plymouth: McCormick, Worrell, Coughlan, Wotton, Hodges, Norris,
Adams, Bent, Gilbert, Evans, Stonebridge. Subs: Phillips,
Capaldi, Aljofree, Lowndes, Keith.
Referee: T Parkes (W Midlands).