It's a pinned 0 moa base but I am not sure if its made by Stiller or another company. I want to get rid of it and buy a 20 moa base because I already have a set of Seekins rings and a GG&G QD one piece mount that I want to use rather than buying a one piece with 20 moa built in and having two other sets collecting dust. I really like the base itself so I was wondering if any of you guys might know the brand and where to get one in 20 moa. Thanks.