Ok, I am looking to upgrade my Mossberg 590 Mariner "Special Purpose". I am looking at the Blackhawk adjustable stock, which is suppose to lessen recoil by 85%. I do not mind recoil, But my son has problems with magnum shells. Any thoughts about stocks? I am also looking for a good sling with attachments. Finally, I am making up my mind on red dot, holographic sights, or just plain ghost sights. Not looking to spend a lot on the sights though. How would you upgrade my shotgun in accordance to German law: 1. No flashlights 2. No lasers 3. No pistol grip only or folding stock (I can have adjustable assault like stocks with a pistol grip) The gun is for protection and hunting from small game to large boars (slugs). Thank you for your time and help.