Scottybuck

If the factory plus 3 is installed, should the sling holder move? If so, is there a way to stop it from doing so, or can it be removed? Looks like it is going to scuff the barrel up by moving, and I don't like the noise of it. Thanks, Scott

Fastlane, was that a plus 2, or plus 4 extension? Scott

Will the factory spring in my Benelli M1 work with the plus 2 extension, or is there another spring I have to use? Thanks, Scott

First post here....just bought an H&K marked M1 super 90 field model 12 gauge. Serial number M1923XX and is marked BD. I know this is 1994, but is there a way to tell when in '94 it was made? Scott