151: DoubleTap Defense Derringer O/U in 9 MM with 3" Ported Barrels. This nifty little two shot derringer features a tip-up action with ambidextrous thumb latch for ejecting fired rounds, 3" ported stainless steel barrels, DA trigger for two consecutive shots, aluminum frame and checkered integral grip that allows you to carry two spare rounds in grip. This is a pocket pistol that will pack a punch and it in very good condition. Estimated Value: Low: $450 High: $550