Dudarino,
Try harder on the attorney.
This isn't a small matter. Depending on how it's handled, it could go away and not cause you problems, or result in the revocation of all your certificates and ratings...if the TSA happens to become involved. The fact that an allegation of unauthorized carriage or use of a firearm is in your aggregate record could easily be enough to cause the TSA to consider you a potential security risk. Under the present regulation and the current state of affairs, the TSA has the legal authority to require the FAA to revoke all your certification. No explaination need be given, and you have no recourse to find out why, once it's done.
With respect to requesting your records, it's evident from your post that you already have access to the material forwarded by your former employer, or you wouldn't be posting this thread. Apparently you don't need to request those records, or at least, that's not your problem at this stage.
Your post was rather nebulous, and didn't include any circumstances or details, or what you are looking for on this board. You have apparently been in contact with your former employer, to no avail. You are apparently aware of, and have seen your records. I can only surmise that you are wanting to make this matter go away.
The short answer is that it probably won't. If indeed there was cause for separation based on the use of the firearm, then the former employer is legally justified, and is required, to report it. If no such justification existed, then your best bet will be to file suit for defamation against that employer with the aid of a competent attorney. It comes down to this: did you do what they said you did, or did you not?
You indicated that other extenuating circumstances existed that lead to your separation from the company. You have indicated that you were let go unjustly. If this is the case, then you need to obtain a legal judgement showing that you are in the right, and this means lawsuit. Until you have something credible to back up your claims, it's a matter of you against the employer. A potential employer must pit your word of mouth against the legal paperwork submitted by your former employer. It's a liability issue for your potential employer. You need to be able to provide him with something just as valid to defend himself, and to put you back in the drivers seat.
If you can win a case against your former employer, then you'll have the weight you need. You can always show that you were exhonerated in a court of law.
If the employer is justified in his or her actions, however, you'll only be serving to dig your own grave, legally speaking.
Having said that, right now you do have something going for you, and that is that you've indicated that you've been hired by two diffeent emplors since that time. This adds credence to your own accounts, only so far as other employers have found ou to be servicable. The more distance you can put beteween you and the events with the firearm, the better.
You stated that you've tried to hire an attorney to no avail. That can only mean that you lack sufficient funds (typical, for pilots) to do so. Finding an attorney is only slightly more difficult than hurting your foot when kicking a rock, so it can't be lack of attorneys.
You do need an attorney; you're more likely to cause yourself more problems going it alone than you are to do any good for yourself. Get the attorney.
Leaving that for a moment, what were you doing with the firearm in your flying job? There are a few positions that require it these days, but very few. Did you have written authorization to carry the weapon? If not, you may well be wasting your time to think twice about it...verbal authorization won't amount to a hill of beans. Do you hold a copy of written authorization to carry?
Leave aside the other reasons you may have separated. Yes, they're bad people and they let you go for refusing to do what you thought was unsafe. That's not relevant. Further, as you progress through different interviews, your attitudes regarding former employers are very important. Don't disparage a former employer, even if you really dislike them. Any future employer will look closely at your attitudes regarding others, especially those for whom you've worked. This is one place where if you have nothing nice to say, then say nothing.
Your mission presently is to have the former employer stop notifying people that you carried a weapon. Make up your mind right now to distance yourself as much as possible from any controversy regarding arguement, weapons, fights, disagreements, or any other problem issue. If you're flying law enforcement, or carry a firearm in Alaska, or one of several other exceptions, carry with written permission to do so. But otherwise, don't even allow yourself to be associated by reputation with carriage or posession...especially in the workplace. It's a very big issue.
I'm all for firearms rights. I own, I carry, I handload, I shoot, and in times past, I was also an instructor. I've been paid to carry, and I've carried in conjunction with flight duties. However, discretion is not only the better part of valor, it's the better part of keeping your career intact. The mere mention of firearms in conjunction with most aviation activities or most employment sends up big checkered red flags for most employers. Regardless of what you believe or think, it's their perceptions that count, and it's those perceptions you want to plan for and live by.
Get an attorney, get counselled specifically on the matter, and pursue it; it really is important.