blazer420ize

Hello all...I took in on a trade a 1988 Comanche that needs a new right front axle. The guy who I got jeep from had a new axle in bed of truck. Took old axle out, and to my surprise. Its half as long as the new one??? Called O'Riley's and they had one that the computer called for. So I went to get, and its just as long as the new one I already have!!! What gives??I'm sure that this? Is commen. Is there an extension in axle tube that needs to come out???