I was just rumaging around at the gun store today and looked at a Tristar Silver 20ga out of curiosity. Took it apart to find it is very similar inside and comes apart just like my A400 Beretta. It also uses Beretta mobile chokes. I have not been up on the TriStar shotguns. The price was attractive. Anything I should know? Are these shotguns copies of the Beretta A400?