PStar G&G SR-25 Spacer For M4 Chamber
OptimusPrime
11 Feb 2020
A howto video from PolarStar Airsoft with thier spacer to allow to put in a regular M4 chamber to a G&G SR-25 equipped with a Fusion Engine... "Have a G&G SR-25 with a Fusion Engine inside and want to upgrade the barrel group? Check out this spacer which allows you to use traditional M4 series chambers in place of the original proprietary chamber!"