The slightly earlier AIII's were also 24" barrels, but these were made for only about 4 years before being replaced by the AV's. At least some of the early AV's were still 24", but later non-magnum calibers were 22". Fiberclass models that Oldelkhunter refers to are somewhat scarce and the stocks were straight-comb without the Monte Carlo cheekpiece. You could do the same thing by just getting a current McMillan stock which has the high comb, checkering, and a palm-swell. That palm-swell is worth its weight in gold - very easy to get spoiled on them.
Good luck!
