unit with greatweapons, so asl, gain the asf rule, so they strike at IN right? ok, what if this unit gains ASF, again ? what happens than?
As per the general FAQ: Page 66 – Special Rules, What Special Rules Does It Have Change “[...]the effects of multiple special rules[...]” to “[...]the effects of different special rules[...]”Add “However, unless otherwise stated, a model gains no additional benefit from having the same special rule multiple times.” to the end of the first paragraph. That being the case, some rules like extra attack and fight in ranks do stack (updated in the same FAQ) but ASF and ASL do not.