This is a simple airsoft tracer plug, specifically for the Acetech Bifrost BT

This plug allows you to turn off the shake-to-wake style airsoft tracers when storing or transporting them. 

A common issue with these tracers is they will turn on while in your gear bag and the battery will sometimes be drained before using them. This plug prevents these style tracers to turn on when transporting.

A groove has been inserted allowing you to use a simple rubber band to hold it in place

using the octogonal form it stays on quite good while the rounded top makes it less likely to damage the tracer

no need for supports, low filament