Springer Precision magwells for FN 509 9/40 are CNC machined from USA 6061-T6511 aluminum and hard anodized for lasting durability & long service life. This magwell has enough room for an easy fast reload, but is ergonomically designed to make it easy to get back to your grip without interference from the magwell. Only fits the 509 full size. 

Requires our basepads or mag extensions for the magazine to fully seat.

.95 oz.

Does not work with the compact or midsize.

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

Installation Instructions