The Gosper glider gun is the first known gun, and indeed the first known finite pattern with unbounded growth, found by Bill Gosper in November 1970.^{[1]} It consists of two queen bee shuttles stabilized by two blocks. Its 36 cells remained the smallest size of any known gun until the discovery of the doublebarreled Simkin glider gun in 2015 which overtook this record with only 29 cells.
As the Gosper glider gun can be constructed with only 8 gliders, it has the smallest known glider synthesis of any gun. It can be destroyed completely by 2 gliders, as shown below.
Trivia
 There are two other ways in which queen bees can interact to form gliders,^{[2]} and a third queen bee can be used to reflect a glider and make a "pseudoGosper gun".^{[3]}
Image gallery
Glider destruction of the Gosper glider gun RLE: here

An inline inverter inverting a glider stream RLE: here

Twogun, the smallest known period60 gun, is composed of two Gosper glider guns. RLE: here

See also
References
External links