I have a pair of 14" Mossberg 590 shotguns. I was toying with the idea of getting a rifled barrel cut down to 14" (never did) If I remember right, the 835 and the 590 (with the short magazine tube) use the same barrel.
I don't know if this helps.
"No, it's not a silencer. This little doodad is my own invention. I call it a loudener." --Sledge Hammer