The P30L is same size as other full size pistols. Not really a long slide. The P30 is equal to the 19X, FN 9 and 40 pistols, etc. Being they are totally different, what he told you does not even seem plausible. A 5" P30 longslide v3 with safety would make a nice hunting/gaming pistol. I have a 5" threaded barrel in my P30L FWIW.