If you're asking about a KRG Bravo, I'd recommend ordering the arca rail from KRG it comes with the mounting hardware. I have two of them.

I have a lot of leftover hardware send me a message.

 

Will bolt right on. Mine came with a short polymer section in the box. Uses mlok slots on bottom of forend.

 

Ok thank you both ,I’m assuming you like the 457 in the Bravo,just can’t get the factory MTR stock to be comfortabl.

 

I had a Tikka T1x in one and I liked it. I wanted to use the rifle for ARA factory class. So I put it back in the OEM stock. I like how it feels in the factory stock. So it's still in there even though I'm really not shooting factory class anymore

I used the pic rail that came with to mount my Atlas bipod under the forend with the m-lok screws that came with. No issues. I have a 10-22 in a KRG Bravo that's setup the same way

 

Usually the Bravo comes with all the little parts needed to do it.
Piece of rail and mlok attachments.

If your just a casual shooter mounting a bipod, then a rail is all you need.
If your going to compete or do any sort of barricades then a ARCA rail
will work better.