Robert : The rule states the you can not have a massive riser , I think a recurve type grip would be ok , as long as the bow is not center shot. The 21st Century bows are legal and they have a long and big riser. Are you talking about a recurve riser (takedown) with longbow limbs ? if so you might be on the edge of the rules. I shot in the worlds at Flatwood ,WV. in the longbow class and the 2nd place finisher was diqualifed for having a center shot bow, I think a red flag was sent up because he had a takedown riser with longbow limbs.

Bill