Check this thread for some answers.
https://www.uzitalk.com/forums/index.php?threads/first-uzi-fa-getting-close-looking-fresh-opinions-on-the-options-to-go-with.99547/
No they did not. I bought the barrel when I first purchased the Mini Uzi, but it took 14 months to approve. They said my window to return was only like 1 month.
The only barrel I had an issue with was a Green Mountain Mini Uzi barrel. The round went to far into the barrel and the fixed firing pin could not reach.
My Mini is a Vector and all IMI and all Barrel X Change have been flawless.
Just passing along some Mini Uzi parts kit appear to be in stock. Appears to be the going price. No barrels and to me it looks like they have micro stocks.
https://atlanticfirearms.com/mini-uzi-smg-parts-kits#
I had been running a bike inner tube over foam padding on mine. After seeing Amphibians post, I bought the tubing Rex recommended. Here is a pic after heating.
I checked all my go to sites and I only found that Numrich has the right Handguard in stock. No left side. Keep checking Gunbroker, it’s bound to show up.
I’d definitely get one. Have a barrel sitting at a business the last 3+ months waiting to get 3 lugged, but would prefer a mount to the barrel nut threads.