I have 4 Sig 551 parts kits without a rear diopter drum sight but have the steak scope rail $2000 each shipped and I have one Sig 551 kit without the rear drumb sight and without the steak scope mount $1900 shipped. All the kits have the drum sight holder. The picture below is representative of the kit you will receive. The one kit for $1900 does not have the scope rail. e-mail me at [email protected] . I am parting out uppers and posting on gunbroker.com.