NOTW

I have gone through and found the majority of the parts on BrickOwl, can someone help me with the 2 parts? I can't seem to get my image small enough to post it is the black 'barrel' under the 2 disc closest together and the light gray part beside the 6 bar 1L pieces. Also, where is the better place to order from, BrickOwl was a little easier to find things on but if BrickLink is better and cheaper I would prefer to order from there?

Looking to build these battle droids from YouTube user hachiroku24, he has given a parts list as a photo. I am new to Lego so I am not familiar with all the part names. Does anyone have this in a list with part numbers so I can order the pieces or is willing to help me find the part numbers? Thank you!!