Help with a bipod

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Think again. How often do you use the bipod? Having a pica rail on the fore end is not the nicest for when you are not using it.
Magpul make a nice bipod with a direct attachment to the sling stud. No pica, no adaptor.

Sling Stud Bipod - Magpul Bipod for Sling Stud

I have used this Magpul for a couple of years and it is a great bipod. It took a short time to get used to Vs a Harris, but I wouldn't go back. MDT also do a very similar sling stud version in their Oryx bipod.