Springer Precision 140mm extended capacity basepads for FN 509 9/40 are CNC machined from aluminum and hard anodized for a long service life. This lengthens the magazine and adds 3-4 rounds to your magazine. The unique locking mechanism allows a very solid attachment with a simple backing out of the discrete set screw. They are compatible with our magwell and fit the USPSA 140mm magazine gauge. 

Fits the FN 509 LS Edge

*We include a 1/16 hex driver that makes installation and removal a breeze.

1.11 OZ

Custom engraved and custom colors are non-returnable.

Due to design variations, Springer Precision cannot guarantee compatibility with any other manufacturer’s aftermarket magwell, unless otherwise specified. Please email us with any questions.