The 590a1 is a heavy gun, adding a bunch of stuff isn't going to help.
You are better off keeping the gun as slick as possible
I have one, they're not light.May the Gods strike me down but I have to agree with zack.
That thing would weigh a ton.
For a bedside gun sure.
For carrying around? Oooof
Looks too simple and underpowered. No bayonet, no tactical hacksaw, no night vision, no thermal + laser combo, no ballistic calculator, no grenade launcher.