Nicholas, you get both the fixed stock and the adjustable version. The fixed stock comes installed on the firearm so you would have to install the adjustable one if you decide to. So I'd definitely opt to get the adjustable version also. Hope this helps.

Nicholas, it does come standard with a "Fixed Stock" but you can purchase the adjustable stock here : budsgunshop.com/product_info.php/products_id/411560661/pw+arms+m4+tactical+adjustable+collapsable+stock+kit ----- Cheers and stay safe!

Nicholas, this one comes with a fixed stock only budsgunshop.com/product_info.php/products_id/411560659/panzer+arms+m4+tactical+semi-automatic+shotgun+18.5+barrel+12ga+3+5+1rd You would need to purchase the adjustable stock separately >>> budsgunshop.com/product_info.php/products_id/411560661/pw+arms+m4+tactical+adjustable+collapsable+stock+kit .....Have a great day!