+1 Extension for Sig Sauer P320 21rd Magazine-Blue
+1 Extension for Sig Sauer P320 21rd Magazine-Blue, Designed for: Model: All Sig Sauer P320 models except Subcompact Grip Module: Full-Size / Full-Size XGRIP / Carry / XCarry / Compact / XCompact Magazine: Only the extended 21 round 9mm or 18 round .40 S&W magazine NOTE: The 17 round or smaller magazines will not work +1 Extension for Sig Sauer P320 21rd Magazine: