extract this to AoS folder -> kv6 then paste it.
Highly recommended, using this skin.
Dual Glock with Eotech Scope (Ace_Of_Dead)
Link : http://gamebanana.com/aos/skins/117643
or try this one, made by me. :D
Dual Glock with Acog Scope (Me / reAper980.)
Link : http://gamebanana.com/aos/skins/118235
if you not using this skin, maybe some bug on your games.