Springer Precision +6 Basepad spring and follower Magazine Extension for Sig Sauer P320 17 Round 9mm Magazine Black

Springer Precision 140mm extended capacity basepads for Sig Sauer P320/P250 9/40 are CNC machined from aluminum and hard anodized for a long service life. Grams extra capacity spring and follower included. This lengthens the magazine and adds 6 rounds to your 17 round Sig P320 magazine. The unique locking mechanism allows a very solid attachment with a simple backing out of the discrete set screw. They fit the USPSA 140mm magazine gauge. The unique attachment design provides a low profile, sleek design that is very stable and easy to remove.