Please make sure you absolutely want one. Think about it and then think some more. You are married to your NFA stuff, it's nearly impossible to sell or get rid of if you ever want to, there are many many restrictions on them, one goof and you can end up in a world of doo doo. That being said you can set up a trust, numerous folks who sell NFA stuff like silencers, SBR's, full auto, etc..will usually walk you through the steps, one at a time, if you want to purchase a can for your Glock. You might talk to the folks at your local gun store, they can probably help.Where do I apply for the tax stamp? Is this something I can do online?
Here's an observation though. About 3 years ago, everyone and their brother around here just had to have 13" barrel (or shorter) for their AR's. Not because they are trained danger ranger's, SWAT members, or anything other than just regular guys, who thought having an NFA rifle, and a can on every pistol would put them on the top tier of "cool factor" folks at the gun club. After a few years of total B.S. (travel restrictions) more paperwork, more waiting, etc., a great many of them came to have deep regrets about having gotten into that game to begin with.
Please don't misunderstand me, if you want a can for your Glock or other pistol, don't let me be a wet blanket, and I certainly don't want to piss on your parade. If you want to shoot silver bullets, that's cool with me. But the fact that you're new to the procedures for obtaining your tax stamp, I just wanted to make sure you know what you're getting into ahead of time. If so, and you're cool with it all, then go ahead with both guns blazing....good luck.