The 4-polyhex illustrated above.
Pistol
See also
PolyhexExplore with Wolfram|Alpha
References
Gardner, M. Mathematical Magic Show: More Puzzles, Games, Diversions, Illusions and Other Mathematical Sleight-of-Mind from Scientific American. New York: Vintage, p. 147, 1978.Referenced on Wolfram|Alpha
PistolCite this as:
Weisstein, Eric W. "Pistol." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Pistol.html