The bottom 3 are police model shotguns. I would like to know if a front sling mount under the magazine cap was available for the folding stock model. I also need a source for the plastic piece that snaps over the folding stock. Is there any source for the accessories for these shotguns (mag extentions, gas grenade launcher, other stuff)? These are model 3000 shotguns, I have heard many bad things about the 916 models. I have a 30'' barrel for the top gun and plan to try it on clay birds.