The Benelli M4/M1014 +2 mag extension and spring are used but in very good condition $80 shipped (it’s genuine Benelli made).
Never installed on any shotgun SRM Performance +4 shot Browning Gold/Winchester SX2 mag extension. It’s Brownells part number # 100-000-588 which retails for $99.95 new. SOLD PF $70 shipped.
http://img.photobucket.com/albums/v408/gotm4/for%20sale/magextensions005.jpg
Payment via USPS MO accepted.