If i am on pretrial diversion can i finish and submit the paperwork for my suppressor (class 3 firearms)?

i'm on pretrial diversion (been charged not convicted) for criminal damage to property 2nd degree. classified as a felony at the beginning but on my forms the probation officer guy filled it out as a misdemeanor. the stipulations are that i stay in the PTD program under the supervision of said prob. officer for a year. i am to complete 40 hrs of community service and complete the drug and alcohol assessment to see if i am an addict. i already did the D&A assessment and i need no treatment. so would i need to wait until the 12 months is up to file my paperwork so it doesn't get denied? my lawyer says he thinks i am ok to do it now. i just don't want to leave my supp. at the gun store anymore. paid it off in august last year then got in trouble and had to get them to stop the paperwork. please don't refer me to the ATF as all they do is transfer your phone call around in a circle until you get an answering machine that they apparently don't listen to messages from. basically only if you have legitimate knowledge of this subject should you respond. i swear if anybody says silencers are illegal to own im gonna crap a brick.