To install the upper handguard, you may need to only file down the surface indicated with the RED arrow.
As with all other things, take your time doing this. Over filing will result in a wobble and clatter...
To correct a wobble/loose fit, you will be back at the welder and then filing..
here i get a very tight and snug fit. So snug, that the upper hand guard/piston tube has no wobble!
★ ... ★
Last edited by fredieusa; 06-19-2009 at 12:09 AM..