Sorry for the delay.
Under Texas law, a "deferred adjudication" is NOT a conviction. However, if you were given a deferred adjudication for a felony, you must wait 5 years to ask the court
for a non-disclosure order. Even if you are successful in getting a non-disclosure from the court, there is a laundry list of entities that will still be able to discover the existence of the deferred -- broadly, any state agency that issues licenses or certifications; and any private entity that is responsible for the safety of children or the elderly, as well as some private entities that hire people for security-sensitive positions.
However, a successful deferred will still impact a job search. It can disqualify a person in some instances from owning a gun or getting licensed by the state in professional capacity. If a person is an immigrant, it can impact applying for citizenship.
With respect to firearms, you may possess firearms and ammunition and go hunting but you cannot buy additional weapons or ammunition or carry them across state lines.
You may wish to speak to an attorney who specializes in getting deferred adjudications made non-public. The attorney may also give you advice regarding the firearms law. Sometimes, an initial consultation is free or at a minimal charge. You can discuss the facts of your case, evaluate your options, and decide how to proceed. Remember, just because you received a deferred adjudication, does NOT mean that it is NOT accessible the the public. However, given the crime for which you received the deferred adjudication, you will have to wait 5 years in order to file a Petition for Non-Disclosure.
I hope you find this information useful. If you have follow up questions, please ask. If you are satisfied with my answer, PLEASE PRESS THE GREEN ACCEPT BUTTON so that the thread can be closed and I can get credit for answering the question. Thank you.