runway,
I am guilty.
I cursed them.
I badmouthed them.
I called them cheap.
I called them no good.
I did this for over 7 years.
Until I used one.
Then I bought one (Mares Sten).
This is what I have learned from my experience:
The guns are about as accurate as a laser at short range. The sight down the barrel is unobstructed.
The smaller size pneumatics (less than 36'') can be more powerful than most 1 or 2 band guns in the same size range especially any gun with the high/low option.
They are not as sensitive to dirt or debris as most without knowledge will claim. You can have a Mamba kit installed on virtually any new gun these days. The Mamba kit is like an environmental kit on a regulator, the kit seals water and debris out of the firing chamber.
They are very inexpensive/easy to maintain. You can send them away to an authorized dealer every year or two to have them serviced/rebuilt which will run you anywhere from $40-60. If you have them serviced properly they are bulletproof. For the price over the service interval, you will spend just as much or more replacing bands. Other than that, the only maintenance required is a wash off with fresh water. Also, the gun should be stored with the muzzle down to keep the piston and firing chamber lubricated (I know somebody already said this).
Pneumatic guns are alot trickier to load in my opinion. This is the thing I don't like most about these guns. The safety does not engage until the piston is pressed to the end of the firing chamber, so extreme caution must be taken in order to ensure the spear is all the way into the chamber otherwise the spear will force to the top of the chamber. This can be very awkward to a novice, especially because it is happening underwater.
The guns are negative without the spear in them. Some hunters prefer a negative gun in low-vis, others do not.
I personally dont know if they are good for ranges beyond 10-12, thats what I have a Riffe Midhandle for
.
For a less than 10-12 range Pneumatic Guns are about as deadly as you can get
.
I hope this was useful information for you.