This is the XGRIP adapter for SIG P320 Sub-Compact / P250 Sub-Compact pistols. The XGRIP will slide on SIG P320 full-size 9mm magazine.

This XGRIP adapts the SIG P320 17-round high capacity magazine for use in the SIG P320 Sub-Compact, incorporating the larger magazine into the P320 Sub-Compact’s grip and increasing the gun’s capacity to 17 rounds.

XGRIP products allow you to incorporate larger magazines into more compact pistols, maximizing capacity and control.