Importance of a quiet speargun

All that to make it more quiet?

im not sure what they mean by quieter, that the shaft makes less noise leaving the barrel?

i think this noise is irrelevant as the fish is dead by the time he hears it. I think adding that extra piece just makes the gun more vulnerable for that thing to fall off. the metal to metal might cause more friction however.

one thing that causes the gun to be noisy in the water is the swivel where the mono is attached rubbing against the barrel while moving through the water, this problem is easily solved by adding a piece of clear pvc over the swivel

As a bowhunter, I have seen calculations that pretty clearly showed that a deer was capable of hearing, and reacting, in time for an arrow to miss the vital kill area from a range of about 40 yards.

I have never seen anything similar for fish. But given that sound travels much faster in water than in air, I have to wonder. Of course, even if a fish were capable of detecting and reacting in time, that doesn't mean that it would. Underwater can be a loud place, so maybe fish just don't perceive our typical gun noises as a threat.

I can only say that they know what noisy bubbles mean . . .

TinMan---'jumping the string" is what we called it back in the day of longbows and recurve bows.
In spearin it might be, "jumping the band", or "jumping the rubber", or in the case of a pneumatic gun user. "jumping the blow job:laughing3:""

Sorry greekdiver, I couldn't control myself.:D
No harm intended:)

Quote from av001

im not sure what they mean by quieter, that the shaft makes less noise leaving the barrel?

i think this noise is irrelevant as the fish is dead by the time he hears it. I think adding that extra piece just makes the gun more vulnerable for that thing to fall off. the metal to metal might cause more friction however.

one thing that causes the gun to be noisy in the water is the swivel where the mono is attached rubbing against the barrel while moving through the water, this problem is easily solved by adding a piece of clear pvc over the swivel

Some fishes may dodge a shaft due to the noise the speargun makes when fired. Even more, you will scare the heck out of the whole reef with a noisy speargun. I have a friend who uses an ole jbl magnum and i can tell you that i notice when he fires the gun from a mile. The quieter the better imo.

I am shooting a RA120 with alum barrel now.
I sometimes miss shots on small reef fish.
I have noticed that many times when I miss that even the targeted fish will dart away just a few feet and return immediatly to check out my shaft in the sand or reef. This makes me think that the fish are not totally scared by the sound of my RA firing. The same behavior is true of a school of spade fish. I will shoot at one, the whole school will flinch at the shot but stay within range to allow me another shot or two.
Many years ago I learned that fish react differently depending on the spearos angle to the fish. If the spearo can approach some fish from straight above that the fish will stay put much longer. Many times I have seen a fish roll onto its side to expose its lateral line to me to see and feel me better. [Usually this is their last act:D]