Amazon.com : Caldwell Bipod Adaptor for Picatinny Rail with Durable Construction and Traditional Bipod or Sling Attachment Hole for Outdoor, Range, Shooting and Hunting , Black : Gun Monopods Bipods And Accessories :
XLR M-LOK™ Bipod / Sling Adapter - XLR Industries
Harris Bipod Adapter Universal-Barrel Clamp NO. 4 For Sale - EuroOptic.com