...
First, I don't think S81 posted because it will take a gun to deal with his neighbor IMO.
Second, if one has been a doormat once too many times during his or her lifetime, and then buys a new gun, and the devil on his/her shoulder is saying
"not gonna take this **** anymore".. you're not new to the club, but wiser for talking, as in these forums, and learning. It's the ones that don't talk that you need to worry about.
The little devil, that gives you this new coat of armor can be tamed thru Instruction, marksmanship practice, and IMO, a 1 or 2 full day tactical course.
When it all becomes past the "thrill" of power, and the discussions and practice bear fruit, along with "talking" and being wiser for listening, you'll be stronger, more powerful, and more responsible, for the *airplane or *ship (*yourself), you are always the Captain of and all that goes with that responsibility.
I would just say, back away, if it gets heated, head back (keeping face to face with whomever) to your property, hands in a OK, you win, I just thought we could work out a friendly solution manner.
Now, if he comes unglued, seek distance and cover, along with loud shouts, warnings, "stop, I don't want trouble" (to perk up anyone nearby) for witnesses you may well need in a court of law to prove your innocents of "in fear of your life" and then and only then should you draw out and point (finger not on trigger).. Get in your house if possible and lock door and call police and wait. The worst case scenario is the idiot breaks down your door, and enters with the words or actions to the effect, he's gonna hurt you, family, kids inside, it all ends inside that door, you are then trained up, and your choice will be clear.
I know I have simplified it, as he may have a weapon, or just himself, but still, at that point, he is the weapon, and there is no guarantee that he will stop before severe damage or death has occurred and beyond, to your dog, if you own one, or any other family member around.
So, here's a couple of good things to try:
In my case, I have a great German Shepherd, and we live next (across the street from) a very nice small park but, we get what I call park traffic and dogs, litterbugs, etc., so I chained him up to the big tree out front and gave him the length to just before the sidewalk. Worked like a charm, people either started walking on the other park-side of the street, or moved quick jerking their dogs off my grass and moving by quick.
When it was to fast for me to get him out to ride fence..lol, I would, and still do, hit the auto water switch and give them a nice bath, and they "can't see me" doing that, because it always happens around the same time late in the day, so they hopefully think it bad timing.. lol
Bottom line in all this and life, is not to show your cards. Don't let anger take control, you give away your intentions and become a mark, maybe not then, but some day later, be it your house is painted, shot full of holes, etc.,
Your best friend is training, and knowledge from asking questions and reading and digesting good information as is above in this thread and make a meal out of it each time.
Common Sense can be learned and it becomes second nature, and you will learn how to use SA (situational awareness) as a wonderful force to keep you one step ahead of most, if not all, situations.
Just outsmart them, one way or another, without giving your cards away.
You'll live longer and be better for it.
LS
PS. not that 2 wrongs make a right, but if you seek the need for revenge, and I have done it without repercussions. Since the neighbor lets his dog out either early in the morn, or in the dark, if this is the case, and he thinks you don't see it or know, then when he can't see you, take your favorite shovel and scoop it and fling it on his driveway under a car tire is perfect, or the far side of his lawn (its gonna smell) and hopefully downwind.. lol
Keep the Dogs of War (bullets or show of gun) unknown, you're the only person that needs to know. The element of Surprise and SA (situational awareness) go hand in hand.
I hope this helps anyone, and if I've got something wrong, I'm listening.