I use harris part #2A
here is the link
http://www.eabco.com/harrisbipods.html
it fit my CM-2 rail kind loose, but once you had the harris bipod on, it tightens up fine, it you wants ti tighten the #2A to the rial, i think a different sized washer would do, but i never feel the need.
here is the link
http://www.eabco.com/harrisbipods.html
it fit my CM-2 rail kind loose, but once you had the harris bipod on, it tightens up fine, it you wants ti tighten the #2A to the rial, i think a different sized washer would do, but i never feel the need.