Here is the best way to get a brand new full metal lined hicaps. No scam 100% legal. Scherer sells these brand new full metal lined Glock magazine tubes. Super nice, I use them in my Glock myself. I prefer them over the preban Glock mags because the plastic does not seem to curl around the feed lips.
The key is you can use them but only to replace a BROKEN magazine tube. The tube must be broken beyond repair and in your possession.
These are the parts I have (preban Glock magazine tubes each for $25 shipped 3 day USPS.
Break them, buy Scherer's $25 tube and replace them. They come with an ATF letter explaining what I just explained.
You will be nothing but happy.
Scherer's mags take factory Glock magazine parts. They fit and function 100%. You can find them in the GUNLIST and SHOTGUN NEWS and of course EBAY.
$25 gets you one plastic preban Tripple K mag tube shipped 3 day USPS.