3d Printed Springfield XD Magazine Extension by thingiverse user 89LT1. Magazine extensions for the XD 9mm magazine. Hold +4 rounds of 9mm. printed with 0.2mm with 50% infill. Includes base extension and locking plate.
Discalimer: follow all laws and regulations regarding magazine capacity for your area, state and federal.
Check out this design, download and print your own here on thingiverse: http://www.thingiverse.com/thing:945484
If you don’t have a 3d printer you can also check out these extensions for you xd magazines on amazon http://amzn.to/1J8RQga