breechblock plunger

19 LETTERS · STARTS WITH B

breechblock plunger is a valid 19-letter word worth 36 points in Scrabble and 45 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

B3R1E1E1C3H4B3L1O1C3K5P3L1U1N1G2E1R1

3 + 1 + 1 + 1 + 3 + 4 + 3 + 1 + 1 + 3 + 5 + 0 + 3 + 1 + 1 + 1 + 2 + 1 + 1 =36 PTS

DOUBLE WORD → 72TRIPLE WORD → 108

MEANING

What does breechblock plunger mean?