Mountain Tactical Arca Rail & Harris Bipod Attachment

Width of the arca rail may cause interference with the spring anchors on the back of the bipod. It either won't tighten up all the way to where the mount sits flush with the arca or, if it does tighten up, you may not be able to swivel the legs.

You will need to change out the Harris to an Arca adapter for best results. Area419 has them but not sure if any others do.
OTH there is too much play in a Harris style bipod for benchrest.

If you want to stay with a Harris bipod, your best (by far) solution is to purchase an ARCA adapter - and the top of that heap (if not the only thing on the heap) is the RRS set.

RRS used to sell a one-piece Harris adapter (photo), but now you have to buy two separate pieces (link above) - which are expensive. LONG TERM, if you do much shooting at all, buy a better bipod with an ARCA clamp.

The standard sling-stud Harris mount is just too weak for "serious" work... I've assisted many new shooters whose Harris bipods were literally flopping around hanging from the stud; they had no idea that such "play" made correct support of the rifle impossible.

*rim-star* said:

Where does it have "play"

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spring loaded legs have a tendency to shift on the props because they are not locked. Neither bad or good.

*rim-star* said:

Where does it have "play"

Click to expand...

Additionally - I should have mentioned this earlier - the knurled tensioning knob (on Harris units that have cant) pretty much needs to be twisted with pliers to really adjust. That needs to be replaced with a KMW Pod-Loc, available through many vendors.

A Harris can be a perfectly adequate bipod for many applications with the aforementioned upgrades, especially for simply shooting from a bench. OP, just keep in mind that many people here are competing in matches where 20+ pound rifles get whanged down hard on different props; the majority are spending $300-400 on bipods and some spend over double that.