You are right, if you don't have the pants it does indeed just look weird. If you stick around a while, you'll find that pinstripe jackets (along with a number of other patters) are regarded as "orphans" when they don't have pants.
Just picked up this guy for a benjamin. Most golden bear stuff I find is sort of off by a detail or two. I think they really got it with this one. Interesting color, fucking awesome mid weight leather, bemberg lining.
stock photo, the one i found doesn't have the pocket zips.