I saw where MikeD was wanting to change his fore-end on his Gander Mountain 535 Tactical. He is most likely running into the same problem as on the 835 with the shorter action slide tube. Hogue makes a action tube nut with a 1 inch thread that can reach further to put on a longer fore-end on the shorter action slide. Another option would be to keep the fore-end as is and add a short tri-rail. Looks like it would have enough room to clamp on the barrel and magazine. I have seen these shorter tri-rails in lots of places. Mine would be too long. Hey guys, feel free to chime in. I don't have a 535. I looks to me that some of the separated forums should be combined. Very little difference in many of the models in how they function and similar problems.