Oh, screw spending a dime on locations to practice learning how to shoot an action scene.
There's no need for that. Plenty of other options - until you KNOW what you're doing before spending money on.
First, Jersey, you're going to want to google your local film commission just on general principles. Find out what the official rules and regs are.
Second, you can do whatever you want
inside your own home or that of your cast, crew, & friends - without any permits or anything. Now, once you step outside and the do-gooder neighbors and passersby can flip out over guys with guns running about on the stoop, sidewalk, and driveway then you're going to need to let everyone know WTH is going on BEFOREHAND and likely have someone standing around watching for incidental do-gooders.
Third, find FREEEEE locations. Abandoned businesses with nice big backyards and parking spaces, commercial buildings for sale, train tracks & yards, brown fields, rock quarries, dirt/rock fill dump sites, under bridges and collective storm drains, service areas behind strip malls, etc.
Places where no one goes for days or weeks, even.
I advise against regular public parks. Maybe a very large park you could do some guerrilla shooting in for just a couple hours without getting thrown out, but... maybe you just might wanna stop by the park manager's station and inquire first.
POLICE
If you're going to have guys with airsoft pistols running about pretend shooting each other outside in public some do-gooder is going to bring the fuzz down on you, and they don't seem to be particularly easy to comfort once they get their hackles up. They donnnn't eeeeven carrrre that you're using airsoft pistols.
And for God's sake don't even consider using a real UNLOADED gun on set just to make practice films. Wait until you know what you're doing before realizing it's not worth the hassle.
Then watch what everyone else is doing:
http://www.youtube.com/results?sear....2.2.0.65.966.24.24.0...0.0...1ac.IiMfHELE50E