Need help with bt4 delta

[Cerberus09]

Hi well ive just bort a BT4 delta and want to fit a sight onto it few questions:

1: How do i fit a sight on it? Few pics to look at:

Does it fit onto that part?
http://i605.photobucket.com/albums/tt132/Cerberus2009/Delta/Photo034.jpg

Or does it fit to this part?
http://i605.photobucket.com/albums/tt132/Cerberus2009/Delta/Photo035.jpg

Few other pics:

With the hopper on.
http://i605.photobucket.com/albums/tt132/Cerberus2009/Delta/Photo037.jpg

Top of gun without the housing on it.
http://i605.photobucket.com/albums/tt132/Cerberus2009/Delta/Photo036.jpg


Right ive been told to get the BT 45° Offset Picatinney Rail:
Scroll down a little bit on this link:

http://www.lpspaintball.biz/acatalog/BTscenario.html

Oh and this is the sight i want to get:
http://www.store.justpaintball.co.uk/marker-guns/bt/bt4-accessories/hangar-18-tactical-40mm-red-dot-sight.html

Im hoping to have it all sorted by the next diamond wars event.

Just hope i aint put this post in the wrong section.
Thanks any help would be great.

 

[Shwat]

May I ask why you want to fit a sight on it? They are pretty useless you know

 

[Cerberus09]

I dunno really it will just look better My bro in law just put one on his tippman and it looks really good.

Want mine to look a bit like the bottom marker of the 2 at this link:
But without the thing on the bottom of its barrel:

http://fightingfiveoh.com/pics/deandd.JPG