SG22 Nut with threaded inserts and Handguard Airsoft

This is a remix of the barrel nut and handguard for the SG-22.

These models will:

1. Stop the handguard from getting loose and flying off
2. Stop the barrel nut from working its way loose since its just plastic on plastic, now bolts will hold it fixed to the handguard

The nut now has 4 holes every 90 degrees so that you can use a soldering iron to press in threaded inserts, I've uploaded two version depending on the size of your threaded inserts at the thickest part. If you don't know the diameter of your inserts just print the smaller diameter hole version (m3x5x4mm).

The Handguard now has a hole at the bottom as well as the top so that you can use socket m3 bolts to reach the threaded inserts on the nut as well as have them sit flush with the handguard and not stick out. I have also tightened up the tolerances where it connects to the upper so it doesn't wobble around as much. Lastly it is a little longer than the original (6mm to be exact).

NOTE: Because I've tightened up the tolerances significantly, fitting the handguard over the barrel nut will be tight the first few times you put it on, it will loosen up quickly the more you remove it. If it doesn't fit at all then it likely printed out of spec due to printer calibration, in which case you can sand it down.