MOA Precision +6 mag extension Deluxe Kit for Stoeger M3000. Comes with blue anodized +6 extension, blue anodized follower, black extension tube end cap, adapter nut, magazine spring, and mag tube brace.
https://moaprecisionllc.com/product/magazine-extension-deluxe-kit-stoeger/#magazine-tube-extension
Does not extend past muzzle of 28" barrel, comes up about 1/2" short. Like new condition. Installed, shot about 50 rounds, and decided to switch to a 30" barrel and longer mag extension.
$100 shipped OBO.
Also available is the 28" Stoeger VR barrel with red fiber optic sight. Only 50 rounds thru it.
https://www.shopstoeger.com/barrels/M3000-12-MAT
$150 shipped OBO.
Take the pair (mag extension kit + barrel) for $225 shipped OBO.
Electronic payment preferred.