David Eppstein describes a smaller p4 gun in B24/S in his paper on growth and decay.

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```
#N p4
#R B2_4___+/S______+++
x = 18, y = 13, rule = B24/S
8b2o$7bo2bo$2bo2bob4obo2bo$b2o3b2o2b2o3b2o$5bo6bo$o3bo2b4o2bo3bo$2bobo
bob2obobobo$2bobo8bobo$2obo10bob2o$3b4o4b4o$bo2bob2o2b2obo2bo$4b2o6b2o
$5bo6bo!
```

Also, since your first post, two new guns have been discovered in Life.

Code: Select all

```
#N Simkin glider gun, p120 mod60
#R B_3____+/S__23____+
x = 33, y = 14, rule = B3/S23
2o5b2o$2o5b2o2$4b2o$4b2o5$22b2ob2o$21bo5bo$21bo6bo2b2o$21b3o3bo3b2o$
26bo!
```

Code: Select all

```
#N p156 glider gun, p156 mod78
#R B_3_____/S__23____+
x = 42, y = 42, rule = B3/S23
20b2o$20b2o$6b2o$5b2o$7bo$3bo$2b2o18b2o$2bobo17bo$22bo$23bo9$32bo2bo$
33b3o$2o38b2o$2o38b2o$6b3o$6bo2bo9$18bo$19bo$19bo17bobo$18b2o18b2o$38b
o$34bo$35b2o$34b2o$20b2o$20b2o!
```

Also, there are two known guns in B2/S0:

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```
#N p4 gun
#O Merzenich, 2012
#R B2______/S0______++
x = 170, y = 31, rule = B2/S0
3bo2bo29bo3bo88bo3bo29bo2bo$24bo5bo6bo8bo12bo19bo10bo19bo12bo8bo6bo5bo
$12bo3bo12bo20bo9bo17bo12bo17bo9bo20bo12bo3bo$8bo6bo13b3o3bobo12b2o12b
o13bo12bo13bo12b2o12bobo3b3o13bo6bo$o3bo4bo9bo2bob2o3bob2o9bobo5bo9bo
15bo2bo10bo2bo15bo9bo5bobo9b2obo3b2obo2bo9bo4bo3bo$bobo2bo4b2o2bo21bo
2bo4bobob2o2bo6b2obo15b2o8b2o15bob2o6bo2b2obobo4bo2bo21bo2b2o4bo2bobo$
6bo7bo4bo8bobo7bo12bo2bo4b4ob2o5bo8bo3b2o3bo8bo5b2ob4o4bo2bo12bo7bobo
8bo4bo7bo$6bo13bo9bobobo12bobo6b2o2bo3bobo3bo3b2o7bo2bo7b2o3bo3bobo3bo
2b2o6bobo12bobobo9bo13bo$16bo13bo11bo4b3o9bo14b3o3bo8bo3b3o14bo9b3o4bo
11bo13bo$7bobo5bo18bo12bo4bo14bo2b2o3bo4bo8bo4bo3b2o2bo14bo4bo12bo18bo
5bobo$8bo13bo3bo6bo3bo10bo9b2o2bo8bo6b2o4b2o4b2o6bo8bo2b2o9bo10bo3bo6b
o3bo13bo$11bo11bobo34bobo3bo6bo3bo14bo3bo6bo3bobo34bobo11bo$5bo4bo42bo
bo2bobobo2bo3bo3bo3b2o4bo2bo4b2o3bo3bo3bo2bobobo2bobo42bo4bo$50bo3bo5b
o5bobobo2bob3obo2bo4bo2bob3obo2bobobo5bo5bo3bo$49bo8b2o6b2o3b2o7b2o2b
2o2b2o7b2o3b2o6b2o8bo$56b5o2bo42bo2b5o$49bo8b2o6b2o3b2o7b2o2b2o2b2o7b
2o3b2o6b2o8bo$50bo3bo5bo5bobobo2bob3obo2bo4bo2bob3obo2bobobo5bo5bo3bo$
5bo4bo42bobo2bobobo2bo3bo3bo3b2o4bo2bo4b2o3bo3bo3bo2bobobo2bobo42bo4bo
$11bo11bobo34bobo3bo6bo3bo14bo3bo6bo3bobo34bobo11bo$8bo13bo3bo6bo3bo
10bo9b2o2bo8bo6b2o4b2o4b2o6bo8bo2b2o9bo10bo3bo6bo3bo13bo$7bobo5bo18bo
12bo4bo14bo2b2o3bo4bo8bo4bo3b2o2bo14bo4bo12bo18bo5bobo$16bo13bo11bo4b
3o9bo14b3o3bo8bo3b3o14bo9b3o4bo11bo13bo$6bo13bo9bobobo12bobo6b2o2bo3bo
bo3bo3b2o7bo2bo7b2o3bo3bobo3bo2b2o6bobo12bobobo9bo13bo$6bo7bo4bo8bobo
7bo12bo2bo4b4ob2o5bo8bo3b2o3bo8bo5b2ob4o4bo2bo12bo7bobo8bo4bo7bo$bobo
2bo4b2o2bo21bo2bo4bobob2o2bo6b2obo15b2o8b2o15bob2o6bo2b2obobo4bo2bo21b
o2b2o4bo2bobo$o3bo4bo9bo2bob2o3bob2o9bobo5bo9bo15bo2bo10bo2bo15bo9bo5b
obo9b2obo3b2obo2bo9bo4bo3bo$8bo6bo13b3o3bobo12b2o12bo13bo12bo13bo12b2o
12bobo3b3o13bo6bo$12bo3bo12bo20bo9bo17bo12bo17bo9bo20bo12bo3bo$24bo5bo
6bo8bo12bo19bo10bo19bo12bo8bo6bo5bo$3bo2bo29bo3bo88bo3bo29bo2bo!
```

Code: Select all

```
#N Quintuple Pump, p5
#O Arie Paap, 2016
#R B2____++/S0______+_
x = 19, y = 46, rule = B2/S0
7bo3bo$6b3ob3o$2bo2bo7bo2bo2$bo5bo3bo5bo$2o2bo2bobobo2bo2b2o$3bo4b3o4b
o$bobo4bobo4bobo$4bo9bo2$o17bo$2bo13bo$3b2o3bobo3b2o$4bo9bo$2bo2bo7bo
2bo$b2o4b5o4b2o$2b3o9b3o2$7b5o$9bo2$4bo4bo4bo$3bo4b3o4bo$3bo4b3o4bo$4b
o4bo4bo2$9bo$7b5o2$2b3o9b3o$b2o4b5o4b2o$2bo2bo7bo2bo$4bo9bo$3b2o3bobo
3b2o$2bo13bo$o17bo2$4bo9bo$bobo4bobo4bobo$3bo4b3o4bo$2o2bo2bobobo2bo2b
2o$bo5bo3bo5bo2$2bo2bo7bo2bo$6b3ob3o$7bo3bo!
```