Sig P320 9/40 extended base pads are CNC machined from aluminum and hard anodized. This lengthens the magazine .375" to make for easier, more reliable magazine changes. They also allow you to use a magwell without adding capacity to the magazines. They are perfect for IDPA ESP and USPSA.   1.08 OZ Perfect for use with Sig P320 X5 with or without the factory magwell. 

*New magazines have a square-style locking floortab/basepad.

*Not for the 21rd 9mm/18rd .40 factory mags, please see SP0218 for a basepad for those mags.

*Not compatible with flanges that fold into the magazine body*

*Picture just for show, actual color is Black*