Get a grip as far back as you can on your BAS. If you can get a comfortable and usable grip on the BAS without touching the brass bolster, the 12" AK or Sirupati should do, but you may have to round and smooth some corners.
I doubt Uncle has any in stock, but if so, grab it. This is a cute, chubby, warm fuzzy friendly khuk. The kind to put on your belt and leave there til you forget you have it on. Get a Sisco leather scabbard, or make one yourself. It likes to be fondled. It would purr like a cat if khuks could purr.