Yep several manufacturers make them. Tac Ops makes a 22 moa 2 piece set and Mike swears by 2 piece bases. I'm not sure that I necessarily agree with him there but Mike has forgotten more about rifles then I know.
Tac Ops also makes 34 MOA and 40 MOA two-piece base sets. I put the 40 MOA set on my X-Ray 51 because the bases are already drilled for 8-40s' and because I could. I know I don't need more than 13 MILS to get to 1,100 yards with BH 175s' but I figured WTF?.
As far as one-piece bases versus two-piece bases go, that debate that has gone on for many years - and I won't tell you that one is better than the other. I do know that Mike Rescigno likes and recommends one-piece bases and he never sells or recommends stuff that doesn't work. His rifles shoot very well indeed with one-piece bases.
Tac Ops also makes 15 MOA, 34 MOA, and 40 MOA two-piece base sets. I put the 40 MOA set on my X-Ray 51 because the bases are already drilled for 8-40s' and because I could. I know I don't need more than 13 MILS to get to 1,100 yards with BH 175s' but I figured WTF? Tac Ops bases are also (Birdsong) Black-T coated.
As far as one-piece bases versus two-piece bases go, that debate that has gone on for many years - and I won't tell you that one is better than the other. I do know that Mike Rescigno likes and recommends two-piece bases and he never sells or recommends stuff that doesn't work. His rifles shoot very well indeed with two-piece bases.
BTW, Leupold has also been making a two-piece 20 MOA (Mark 4) base for many years, but they also make a flat two-piece Mark 4 base so if you go that route make sure you order the correct one!
Keith