7.62x54r vs concrete!

hi
id like to get a bipod for my mosin also do you remember the model swivel i would need or is just any basic swivel? thanls'al

It's a certain uncle mikes screw, the package comes with two screws, a short one and a long one. part number is 2520-0 use the short screw so you don't hit the cleaning rod. here is a video of what I'm talking about.
http://www.youtube.com/watch?v=2Iiyci9_Hi8
 
Impressive! I have seen concrete cyls like that before. IIRC they are for destructive testing of concretes in a giant concrete crushing apparatus. Almost as impressive as shooting at them! Wish i could get my hands on some to shoot at! ..wonder how M2 ball 30.06 would compare.