L403A1 style handguard

L403A1 style handguard for airsoft use. AEG 31.8x1.5mm threads , screw in directly. Use spacer to fit your barrel and time handguard correctly.

For example, One loop is 1.5mm, if you need to time 45degrees. 1,5mm*45/360=0,1875mm, in other words you need ~0,2mm shorter or longer spacer, scale Z-axis accordingly.

You should also use collar. collar18 is for 18mm barrel, collar19 is for 19mm barrel. You need headless m4 screw to secure it.