Matthew, this is 5+1. The 6+1 model is the new 590S Shockwave with 18.5” barrel, model 51600. budsgunshop.com/product_info.php/products_id/109193/mossberg+&+sons+590+shockwave+12+ga+185+bead+sight .....Have a great day!

Matthew, just an error in one of the listing on Buds part. Both have 5rd tubular magazines and with one in the chamber hold 6 rounds total. Cheers and stay safe!

They are both 5+1 for a total capacity of 6. Not sure why they listed one as "5+1" and the other as "capacity 6" but its 6 of one half dozen of the other, which is to say its the same thing worded different.