The Remington 11 is a good gun. There are little in accessories for it.
Like most shotguns, IT IS NOT DROP SAFE WITH A SHELL IN THE CHAMBER! I know of no shotguns that use a firing pin block -- that does not mean that none exist, just I have not run into any.
Recoil depends on two factors -- weight of ejecta, and weight of firearm.
Parts for the 11 may be a problem.
Last, if reliability is critical, buy a good pump, Mossberg or Remington. GLV