Mec-Gar Plus 2 Magazine Extension Set for Sig Sauer P320 Full Size 9mm

Two extra rounds in a P320 full size magazine, using the magazine you already own. The set swaps the floorplate for a polymer Plus-2 extender and a heat treated phosphate steel locking plate, so only the bottom of the magazine changes.

Mec-Gar builds it under their IFS+ line of upgrade parts. Fitment is specific, covering Sig Sauer P320 full size 9mm magazines, and the package holds the extender and the locking plate.