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GG&G Harris Bipod Adapter (Picatinny rail)
Rotating Quick Detachable Bipod Adapter for Picatinny Rails - Green Blob Outdoors
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Sun Optics Picatinny Bipod Adapter with Swivel Stud ST1007 B&H
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 : Sports & Outdoors - Amazon.com
RGB QD Quick Release Bipod Adapter Sling Mount Swivel Fit 20MM Picatinny Rail | eBay