This outer barrel spacer is press fitted between the outer barrel and handguard to stabilize the outer barrel, removes all wobble. There is an o-ring slot if you wish to have it ultra tight, this is optional as the fit is very good already without. Adjust using 21-23mm Outer Diameter, 1-2mm thickness O-ring. SRS-A1 Version available as well.
Tap gently with a rubber mallet for installation the first time.
Install with a paracord attached with knots on both ends and push the extra length in the rail for easy removal.
This is for airsoft use only!!