I wouldn’t recommend a speargun for self-defense; a jury might consider it a bit . . . cruel. Then again, gun laws may prevent law=abiding citizens the right to keep and bear firearms. If that’s the way you roll, for whatever reason, needless to say, Herr Sprave’s +p++ and two-shot version offers improved penetration. It’s a clever innovation for those of you who think you might have to recreate Thunderball on land. Just remember to laugh as maniacally as our man.
Source:: Truth About Guns