User blog comment:Kogath/Monster Hunter 4 Ultimate for the Nintendo 3DS/@comment-26218407-20150318015613/@comment-5043481-20150318131638

For MH4U I'm going to say no, I'm now at G sergios urgent and have unlocked approximately 40 pages of armour in the smithy. More will come later, I havn't even started on G2 yet. 40 pages (so far), 8 on each page, then 5 lists in total comes to 1600. 100 things can be stored on each page of the item box, and 15 pages max, so no, you can't get them all.

You could get for example "all blademaster sets" or "all G rank sets" though.