It depends on what the crime is that is on your record. If it is a felony, you can't legally own a handgun anywhere in the U.S.
Nope
As long as you have a Maryland handgun permit and as long as the gun meets any specific requirements in Maryland law.
I'll take a guess that you mean, "Can you own a handgun if you have a misdemeanor on your record." The answer is, it depends on what type of misdemeanor you have. See the following link for more information. http://en.wikipedia.org/wiki/Gun_Control_Act_of_1968#Prohibited_persons
Mid-Atlantic Firearms Training has some of the best training in Central Maryland. They specialize in pistol and handgun training and offer classes and lessons for beginners through advanced shooters. Instructors are NRA Certified and Maryland State Police Qualified Handgun Instructors.
Mid-Atlantic Firearms Training does concealed carry weapons training for Maryland handgun permit, Florida Handgun Permit and Utah concealed carry permit.
Before you get to Maryland, you take your handgun, lock and clear it, and put it in the trunk of your car. Maryland doesn't give reciprocity to out-of-state CCW holders.
Mid-Atlantic Firearms Training provides safe and fun handgun training in Maryland and the greater Baltimore area. Instructors are NRA Certified as well as Maryland State Police Qualified Handgun Instructors. www.midatlanticfirearmstraining.com
In general, any felony makes you inelligible to own a handgun.
If you have a handgun carry permit, definitely. The handgun carry permit covers "any handgun that you legally own or posses."
By federal law you may own or possess a handgun at age 18, but you cannot purchase handgun ammo or a handgun from a dealer until age 21.
To legally purchase or own a handgun, you must be 21.
In Maryland, it is illegal to record someone without their consent.