They use the same action one is stainless and the other is blued steel. It all depends on what model 12 your referring to, they do change the bolt handle's around on the models. The bigger bolt handle is called the BT bolt handle. The 16 uses a sporter barrel ,and the model 12 uses a heavy varmint profile barrel. The model 12 will have a lighter spring in the accu-trigger. Besides that they are the same.
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