Mine is a GUNSLINGER mod. #1505 by Plano. Not expensive, very sturdy plastic. Removes from the rack to carry. Can be locked onto the ATV and locked closed for shipping.
I don't know where you ride, but here in the Ozark forests the guys (idiots?
) who use the handle bar racks usually destroy their rifle when the try to go between trees. My rack rides on the side and the rifle even weather protected. I like.