Help for Bipod and adapter ?

Hello friends, I need advice / help with a bipod that will be put on the FX Streamline walnut .25.

I was thinking of using a bipod adapter that snaps into the air tube: http://www.airgunsofarizona.com/pcp-accessories/fx-bipod/sling-stud-clamp/ BUT this is not a good idea!, that is, it will have to break through the stockpile and put a suitable adapter ?!

There are two questions to me:
1. Chuck advises me on one of these two bipod: Harris Bipodhttp://www.airgunsofarizona.com/bipods/harris-hbl-s-bipod-9-to-13-swivel/
or UTG Heavy Duty Reconhttps://www.pyramydair.com/s/a/UTG_Bipod_Heavy_Duty_Recon_360/5940, BUT from this site I can not buy from Bulgaria :( and in front of me there are these three versions of Harris:
1.1 HBLS http://www.harrisbipods.com/HBLS.html
1.2 HBLM http://www.harrisbipods.com/HBLM.html
1.3 HBLMS http://www.harrisbipods.com/HBLMS.html
and I do not know who to stop? and "Standard legs" or "Notched legs"?....Please advise and if you can justify "Why".

The other option is this: UTG Heavy Duty Recon 360 and I do not know if it is better or worse choice than the above ones? If you can say something here...?

My second question is: What kind of adapter do I need for the stockpile so I can put Harris or UTG? Please if you can advise me on both bipod brands what adapter will be needed?

Thanks in advance!

 
First you need to decided on the length of the bipods legs that you need. 6-9" (short) is a common length and is what I use.

Then you'll need to decide if you want the ability to cant (tilt) the rifle while on the bipod without adjusting the legs.

Then decide if you need it to swivel (rotate).

Once you know those three things, you can choose a bipod with the features you want/need.

Most bipods are able to attach to a picatinny rail section....some might need an adapter if they are made for a sling swivel stud. Some come with the adapter.

I use a basic UTG bipod that is very sturdy and well built for the price. It has no cant or swivel features though. I have it mounted to a pic rail section that I mounted to the forestock. I had to drill two holes in my stock and holes from the inside for capture nuts. It's the best way to keep the mount solid and tight.
 
Notched legs will deploy to any of the notched positions that you want, each leg independent of the other.

Unnotched legs will require you to lock the legs to the length you want with those knurled adjustment/locking knobs.

If you have the money, and of those choices you listed, I would go with a Harris with the swivel (tilt) feature. The legs will notch into place to make it close to being level, and you then tilt the rifle to make it perfectly level.

Keep in mind that you will need an adapter for the Harris to mount to a rail section, and those adapters are not cheap. On the plus side, there is a rotating adapter that will give you the ability to rotate the rifle once it is leveled out.
 
Thank you so much Bob!
Because I have no experience with a bipod so I missed giving details about me ...

I go to shoot in the mountain area where I live. The places where I shoot are the meadows between trees or the woodworker truck roads, which determines the terrain as uneven, comparatively and mostly with different displacement.

I shoot down on the ground and at least until now I have not found a place to shoot at a table or anything at all. That is to say:
- the bipod must be able to move in four directions;
- because the terrain is in most cases mild or more uneven, the legs have to be able to adjust with a different even maybe minimum length and direction;
- the minimum and maximum adjustment height of the bipod ... I now tested lying on the ground on a flat terrain and measured from the stock (where there would be a bipod) but on Hatsan 125 who I currently have to the ground: 13 cm ~ 5.12 inches. Of course, where I'm going, the terrain will not be so level and there will be a displacement to the target ... but at least 6 "- 9" will be enough (well I did not order high before asking here ...).

Unfortunately, money is a problem BUT not at all costs. Atlas I have not seen them yet, even though I've heard of them. Honestly, and Harris are expensive to me by adding an adapter that is often unreasonably expensive ...
 
UTGs are more affordable for me, and in most cases are complete with adapters ... but do not know if they are good in quality like Harris and Atlas?

Of course I will not go to competitions or look for some "beauty" or to glory in front of other people ... I am looking for functionality and stable good workmanship.

Now I'm starting to wonder about something else ... because I measured a distance of 5.12 inches, then any upward rise will start to be a problem ... especially if the goal is in a much lower position ... Maybe I have to look around for another bipods height adjustment range ...
 
I've looked at what's from these two bipods brands as an option for me and it's just:
1. HBRMS Harris Bipod Extends from 6" to 9" with leg notches (Swivels)
http://www.harrisbipods.com/HBRMS.html

2. UTG Heavy Duty Recon 360 Bipod, Cent Ht: 5.59"-7.0"
http://www.utgeurope.com/prod_detail.php?mitem=bipod&level1=&level2=&itemno=TL-BP02&status=&mtrack=m

By removing Atlas as very expensive, apart from the above two, is there a variant - a brand that is quality enough but I missed it?

Thanks in advance!