SledgeHammer Games is bringing an all new pistol to the table consisting of 10 weapon variants available via Supply Drops and Advanced Supply Drops. This gun has excellent range and mobility but also a lot of recoil, which can be expected from a heavy duty Revolver as such.
The M1 Irons is a non-DLC weapon and will be available to all Advanced Warfare players soon. It is a primary weapon and will be grouped with the Riot Shield and MDL under the "specials" tab.
Source: community.sledgehammergames.com