SG22 Nut with threaded inserts and Handguard

Barrel nut and 4.33 inch handguard for the SG-22. The nut uses heat set inserts for a more secure assembly. 

The nut has 4 holes every 90 degrees. Use a soldering iron to press in threaded inserts. There are two versions of the nut depending on the size of your threaded inserts.  If in doubt print the smaller diameter hole version (m3x5x4mm).

The Handguard has a holes at the bottom and the top. Use m3 cap head bolts to attach the guard to the threaded inserts.

The tolerances are significantly tighter than the original.  Fitting the handguard over the barrel nut will be tight the first few times you put it on. It will loosen up 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 to fit.