I had a 16" kit built, with an ORF sleeve on the barrel. I sent them the barrel to fit the fake PBS-5 to the rifle, so they've got them available now I believe if you call and ask. Mine looks a lot like the one on their website at www.ohiorapidfire.com in the AK section, except I used a Global receiver.
I got to test-fire it once before deploying overseas, and other than a little trigger slap from the K-Var US H/T/S, it's great. I wasn't able to fold the stock since I left in August, but my friend with whom I left the rifle says it's a nice, operable folder.
If you have to go the 16" route, I think it's the way to go. The recoil is fairly light from the round, and the extra weight of the sleeve helps. The only drawback that I can see is the rifle is now rather front-heavy.
Hope this helps.