I'm about to test out Silencerco's customer service in regards to a repair that is needed on my Specwar 762. Are there any rules regarding shipping a suppressor? They told me I could ship it directly to them but didn't specify how or what carrier to use, only that I needed to include a copy of my form 4 with it and it would be shipped directly back to me after they fix it. Anybody shipped one yet? A google search appears that USPS should handle it but I wanted to make sure before I show up at the post office with it.