Sig Sauer P227 45 Auto (ACP) in Black Nitron Pistol - 10+1 Rounds - The Sig P227 is a double action/single action trigger and comes in a .45 ACP. Comes with (1) 10 round magazines and features SRT Trigger System, SIGLITE Night Sights. The P227 is in the Nitron version. EXCELLENT CONDITION.