Hello, I have a standard remington 870 that i put a 18" mossburg barrel from Cabela's on for home defense. I am going to be doing some deep woods camping soon, and would love to take it along, but there is currently no way to mount a strap on it to sling it over my shoulder. What parts would i need to do this? Also, what is a good over the shoulder strap for this? Links would be very helpful. Thank you so much!