I found where I was stashing the 2L tanks and stopped using them to store gasoline, then went ahead and built both the pneumatics and a .308 pipe rifle because I have scads of .308 lying around.
In the baseline game, it’s very much a mixed bag:
Keltec Sub-2000++ loaded with 17 rounds of 9mm FMJ with homemade suppressor and rail laser sight: 7.5 lbs, max 32 tiles, careful aim: 5 tiles @ 7 seconds, precise aim: 10 tiles @ 9 seconds, damage 22 AP 4
penumatic bolt driver with 8 steel crossbow bolts: 10.7 lbs, max 26 tiles, careful 7 tiles @ 13 seconds, precise 22 tiles @ 15 seconds, damage 40 AP 10.
pneumatic assault rifle with 15 bearings: 9.6 lbs, max 30 tiles, careful 7 tiles @ 12 seconds, precise 24 tiles @ 14 seconds, damage 21 AP 1.
pipe rifle with 6 rounds of .308: 5.33 lbs, max 60 tiles, careful 7 tiles @ 8 seconds, precise 19 tiles @ 9 seconds, damage 55 AP 2.
For an emergency gun, the pipe rifle is surprisingly attractive: light weight, high damage, good accuracy. It reloads faster than anything other than the Sub-2000, and is the fastest aiming gun.
Decisions, decisions…