This is a factory SIG P320 Sub-Compact 12-round magazine, chambered in 9mm.

This magazine also fits the SIG P250 Sub-Compact pistol.

Featuring premium steel feedlips and a steel spring, the internals of this P320 subcompact magazine lives up to the Sig Sauer name.

Witness holes on the right side of the magazine allow you to check how many rounds are left in the magazine – no more need to count rounds.

Its impact-resistant polymer baseplate fits flush in the Sig Sauer P320 subcompact handgun.