I'm a Maryland resident. When I go to most any gun shop out of state I ask if I can buy an AR-15. Some say yes, others say no. Gander Mountain for example, 1 store in Pennsylvania has said, yes as long as its Pennsylvania legal and federally legal they will sell me the gun, but another store said no we must follow Maryland law and won't sell. Whats the deal? From an FFL perspective can you sell me a firearm same day if you know that in my home state that firearm would require a 7 day waiting period and Maryland State Police background check? I'm not looking for legal advice just wondering if anyone actually knows what's allowed and what's not. When I do finally purchase my AR I'm going to do it through Maryland (even if it means a transfer)to ensure that I am on the legal side of the law.