Gauss rifle ain't working either and that already got gold star rating :( only got pistoleer one so far. Although I guess Game Center awards bugged all over the shop. Issue with other games too. My omega award ain't registered too despite complete Cerberus prime revolution 10.
Thanks. Confirmed that you need to use whippersnapper pistol to get pistolers award. Anyone know what to use for others? I only have coin weapons hence both shotguns I have don't contribute to the shot gunner :(