I have one Atlas bipod. It is very good IMO. You could change different leg ends and get spare parts.http://www.accu-shot.com/Atlas_Bipods.phpOr this one....http://www.sinclairintl.com/shooting-rests-bipods/bipods/monopods/bipods-adapters/tactical-bipod-sling-swivel-mount-prod35272.aspxHearing good about this brand also