The amusing thing is, they're selling something like this at K-Mart for around $15.
Here's the plunger.
Anyway, it works very well as a watergun. Tonight, I was playing around, pumping it, and decided to pop a barrel on it. Typical SNAP construction, 1" => .5" reducing bushing, and one of my fixed barrels.
Size comparison with the SNAP-1:
That's a lot of slow air.
I shot it around the house for a bit, and found that it really had some power behind it. I took advantage of the break in the rain with no wind, and did some range testing. I tried a stock Mega whistler (stuck in the end of 21/32" brass) and got 50' and 55'. Micro stefans were a lot more fun: five shots yielded ranges of 80', 85', 85', 85' and 90'. Accuracy is a challenge, as the rear hand moving forward tends to jostle the barrel....but I was able to fire to the same general spot every time.
The immediate practical applications of this are about nil, except for fun. It's not accurate enough to take advantage of its range, and the concept of a breech/magazine for faster ROF is silly. As a Nerf gun, it makes a much better water gun, really. However...this could be a lot of fun with a larger diameter plunger (like from the Big SNAP) and homemade pool noodle rockets.
Edited by Carbon, 30 May 2016 - 04:55 PM.