Ok, to make a long story short I was issued a new patrol vehicle and my shotgun will not fit the new rack with my Mesa side saddle mounted. Dept policy will not allow extended tubes, so I need to figure out a way to carry extra ammo on the gun. Carrying it on my person is not an option. I carry with 3 rounds of buck in the tube, empty chamber, and in the old side saddle was 3 buck and 3 slug. I'd like figure out a way to at least carry a couple extra rounds of slug somewhere on the gun in case I need to go that route instead of shooting buck. I am not a 3-gunner, but I thought I saw pictures somewhere of shooters that had an "emergency" reload of 2 shells available on the ejection port side. Can't remember if it was a velcro attachment or something else. I have room to mount something like this on the ejection port side, but not the opposite side.
Anybody know of something like this for an 870? If not, do I have any other options besides a Speedfeed stock?