The TAC series is Rock Island Armory's most versatile, all-around 1911 and includes precise engineering elements built with every tactical advantage and choice you could want. All TAC series 1911s include a full-length under-picatinny tactical rail to allow any choice of custom attachment. Skeletonized hammers and triggers with over travel stop provide adjustments important to anyone looking for a fully capable 1911. Caliber choices include 45acp, 10mm, 40 S&W and 9mm while offering multiple combinations of size, sight, capacity and grip options. This series is the choice for serious 1911 buyers who want an option for how it will serve them in both tactical and classic applications.